NOTE AND RESTRICTED STOCK PURCHASE AGREEMENT

Exhibit 10.37

NOTE AND RESTRICTED STOCK PURCHASE AGREEMENT

This Note and Restricted Stock Purchase Agreement (this “Agreement”) is dated as of June 20, 2007 among Catcher Holdings, Inc., a Delaware corporation (the “Company”), Catcher Inc., a Delaware corporation and the wholly owned subsidiary of Catcher Holdings, Inc. (“Catcher”) and the purchasers identified on the signature pages hereto (each, including its successors and assigns, a “Purchaser” and collectively the “Purchasers”).

WHEREAS, subject to the terms and conditions set forth in this Agreement, the Company desires to issue and sell to each Purchaser, and each Purchaser, severally and not jointly, desires to purchase from the Company, securities of the Company as more fully described in this Agreement.

NOW, THEREFORE, IN CONSIDERATION of the mutual covenants contained in this Agreement, and for other good and valuable consideration the receipt and adequacy of which are hereby acknowledged, the Company and each Purchaser agrees as follows:

ARTICLE I

DEFINITIONS

1.1 Definitions. In addition to the terms defined elsewhere in this Agreement, the following terms have the meanings indicated in this Section 1.1:

“Action” shall have the meaning ascribed to such term in Section 3.1(j).

“Affiliate” means any Person that, directly or indirectly through one or more intermediaries, controls or is controlled by or is under common control with a Person, as such terms are used in and construed under Rule 144 under the Securities Act.

“Closings” means the Initial Closing and each Subsequent Closing.

“Closing Date” means the date of (i) the Initial Closing; and (ii) each Subsequent Closing, respectively.

“Commission” means the Securities and Exchange Commission.

“Common Stock” means the common stock of the Company, par value $0.001 per share, and any securities into which such common stock may hereinafter be converted or exchanged pursuant to a plan of recapitalization, reorganization, merger, sale of assets or otherwise.

“Company Counsel” means Morrison & Foerster, LLP, 12531 High Bluff Drive, Suite 100, San Diego, California 92103.

“Conversion Shares” means the shares of Common Stock issuable upon conversion of the Notes pursuant to Section 6 thereof.

“Disclosure Schedules” shall have the meaning ascribed to such term in Section 3.1 hereof.

“Exchange Act” means the Securities Exchange Act of 1934, as amended.

“GAAP” shall have the meaning ascribed to such term in Section 3.1(h) hereof.

“Initial Closing” shall have the meaning ascribed to such term in Section 2.1.

“Liens” shall have the meaning ascribed to such term in Section 3.1(a) hereof.

“Loan Amount” means, as to each Purchaser, the aggregate amount to be repaid by the Company hereunder and evidenced by the Notes.

“Losses” means any and all losses, claims, damages, liabilities, settlement costs and expenses, including without limitation costs of preparation and reasonable attorneys’ fees.

“Material Adverse Effect” shall have the meaning assigned to such term in Section 3.1(b) hereof.

“Notes” shall mean the Secured Convertible Promissory Notes issued to the Purchasers pursuant to this Agreement, in the form attached hereto as Exhibit A.

“Person” means an individual or corporation, partnership, trust, incorporated or unincorporated association, joint venture, limited liability company, joint stock company, government (or an agency or subdivision thereof) or other entity of any kind.

“Proceeding” means an action, claim, suit, investigation or proceeding (including, without limitation, an investigation or partial proceeding, such as a deposition), whether commenced or threatened.

“Purchase Price” means the amount set forth next to the Purchaser’s name on the signature page to this Agreement. The Purchase Price received by the Company shall be allocated such that (i) an amount equal to (x) the number of Shares purchased by the Purchase Price multiplied by (y) the fair market value of a share of the Company’s Common Stock as of that Closing Date shall be allocated as paid in capital and (ii) the remainder of the Purchase Price shall be allocated as consideration for the Note.

“Registration Rights Agreement” means the Registration Rights Agreement dated as of the date hereof, among the Company and the Purchasers, in the form of Exhibit B.

“Registration Statement” means a registration statement covering the resale of the Shares by each Purchaser as provided for in the Registration Rights Agreement.

“Required Approvals” shall have the meaning ascribed to such term in Section 3.1(e) hereof.

“Rule 144” means Rule 144 promulgated by the Commission pursuant to the Securities Act, as such Rule may be amended from time to time, or any similar rule or regulation hereafter adopted by the Commission having substantially the same effect as such Rule.

“SEC Reports” shall have the meaning ascribed to such term in Section 3.1(h) hereof.

“Securities” means the Notes and the Shares.

“Securities Act” means the Securities Act of 1933, as amended.

“Shares” means the shares of restricted Common Stock issued pursuant to this Agreement, together with any shares of Common Stock issued upon a stock split, dividend or other distribution, recapitalization or similar event with respect to the foregoing following the Closing Date.

“Subsequent Closing” shall have the meaning ascribed to such term in Section 2.1.

“Subsidiary” means any subsidiary of the Company as set forth in the SEC Reports.

“Trading Day” means any day during which the Trading Market shall be open for business.

“Trading Market” means the following markets or exchanges on which the Common Stock may be listed or quoted for trading on the date in question: OTC Bulletin Board, the American Stock Exchange, the New York Stock Exchange, the Nasdaq Global Market or the Nasdaq Capital Market.

“Transaction Documents” means this Agreement, the Notes and the Registration Rights Agreement.

ARTICLE II

PURCHASE AND ISSUANCE

2.1 Closings. At each Closing, the Company agrees to issue and sell to each Purchaser participating at such Closing (i) a Note for a Loan Amount equal to the Purchase Price multiplied by 1.3 and (ii) a number of Shares equal to the Purchase Price divided by $2.85714, and, subject to the terms and conditions contained herein, each such

Purchaser severally agrees to pay to the Company the Purchase Price. The initial closing (the “Initial Closing”) of the transactions hereunder shall take place at the offices of Company Counsel after the receipt by the Company of an aggregate Purchase Price from Purchasers of at least $1,000,000 and after it has been determined that all conditions in this Agreement have been met in the sole and absolute discretion of the Company. Following the Initial Closing, the Company may, at subsequent closings (the “Subsequent Closings” and each a “Subsequent Closing”), accept additional investments from Purchasers until such time as the Company has issued Notes and Shares with an aggregate Purchase Price equal to $3,000,000. At each Closing, funds equal to the Purchase Price of each Purchaser shall be delivered to the Company and the Company shall deliver to each such Purchaser his, her or its respective Note and Shares as provided herein and the other items set forth in Section 2.2 issuable at such Closing.

2.2 Conditions to Closing. Each Closing shall be subject to the following conditions and deliveries being met on such Closing’s Closing Date:

(a) At or prior to the Closing, unless otherwise indicated below, the Company shall deliver or cause to be delivered to each Purchaser participating in such Closing the following:

(i) a Secured Convertible Promissory Note evidencing the Loan Amount of such Purchaser, duly executed by the Company and registered in the name of such Purchaser;

(ii) a stock certificate evidencing the Shares purchased by such Purchaser, registered in the name of such Purchaser;

(iii) this Agreement, duly executed by the Company; and

(iv) the Registration Rights Agreement duly executed by the Company; and

(b) At or prior to the Closing, each Purchaser participating in such Closing shall deliver or cause to be delivered to the Company the following:

(i) such Purchaser’s Purchase Price;

(ii) this Agreement, duly executed by such Purchaser; and

(iii) the Registration Rights Agreement duly executed by such Purchaser.

(c) It shall be a condition to the obligation of the Company, on the one hand, to issue and sell the Notes and the Shares to be issued and sold at a Closing, and of the Purchasers participating in a Closing, on the other hand, to purchase such Loan Amount represented by the respective Note and such Shares, that all representations and

warranties of the other party(ies) contained herein shall remain true and correct as of the Closing Date of such Closing and all covenants and obligations of the other party(ies) shall have been fully performed or otherwise satisfied or waived if due on or prior to such date.

ARTICLE III

REPRESENTATIONS AND WARRANTIES

3.1 Representations and Warranties of the Company. The Company hereby makes the representations and warranties set forth below to each Purchaser:

(a) Subsidiaries. The Company has no direct or indirect Subsidiaries other than as specified in the SEC Reports. Except as specified in the SEC Reports, the Company owns, directly or indirectly, all of the capital stock or other equity interests of each Subsidiary free and clear of any lien, charge, security interest, encumbrance, right of first refusal or other restriction (collectively, “Liens”), and all the issued and outstanding shares of capital stock of each Subsidiary are validly issued and are fully paid, non-assessable and free of preemptive and similar rights.

(b) Organization and Qualification. Each of the Company and the Subsidiaries is an entity duly incorporated or otherwise organized, validly existing and in good standing under the laws of the jurisdiction of its incorporation or organization (as applicable), with the requisite power and authority to own and use its properties and assets and to carry on its business as described in its SEC Reports. Neither the Company nor any Subsidiary is in violation of any of the provisions of its respective certificate or articles of incorporation, bylaws or other organizational or charter documents. Each of the Company and the Subsidiaries is duly qualified to do business and is in good standing as a foreign corporation or other entity in each jurisdiction in which the nature of the business conducted or property owned by it makes such qualification necessary, except where the failure to be so qualified or in good standing, as the case may be, could not, individually or in the aggregate: (i) adversely affect the legality, validity or enforceability of any Transaction Document, (ii) have or result in or be reasonably likely to have or result in a material adverse effect on the results of operations, assets, prospects, business or condition (financial or otherwise) of the Company and the Subsidiaries, taken as a whole, or (iii) adversely impair the Company’s ability to perform fully on a timely basis its obligations under any of the Transaction Documents (any of (i), (ii) or (iii), a “Material Adverse Effect”).

(c) Authorization; Enforcement. The Company has the requisite corporate power and authority to enter into and to consummate the transactions contemplated by each of the Transaction Documents and otherwise to carry out its obligations hereunder or thereunder. The execution and delivery of each of the Transaction Documents by the Company and the consummation by it of the transactions contemplated hereby or thereby have been duly authorized by all necessary action on the part of the Company and no further consent or action is required by the Company other than Required Approvals. Each of the Transaction Documents has been (or upon delivery

will be) duly executed by the Company and, when delivered in accordance with the terms hereof, will constitute the valid and binding obligation of the Company enforceable against the Company in accordance with its terms, subject to applicable bankruptcy, insolvency, fraudulent conveyance, reorganization, moratorium and similar laws affecting creditors’ rights and remedies generally and general principles of equity. Neither the Company nor any Subsidiary is in violation of any of the provisions of its respective certificate or articles of incorporation, bylaws or other organizational or charter documents except where such violation could not, individually or in the aggregate, constitute a Material Adverse Effect.

(d) No Conflicts. The execution, delivery and performance of the Transaction Documents by the Company and the consummation by the Company of the transactions contemplated thereby do not and will not: (i) conflict with or violate any provision of the Company’s or any Subsidiary’s certificate or articles of incorporation, bylaws or other organizational or charter documents, or (ii) subject to obtaining the Required Approvals, conflict with, or constitute a default (or an event that with notice or lapse of time or both would become a default) under, or give to others any rights of termination, amendment, acceleration or cancellation (with or without notice, lapse of time or both) of, any agreement, credit facility, debt or other instrument (evidencing a Company or Subsidiary debt or otherwise) or other understanding to which the Company or any Subsidiary is a party or by which any property or asset of the Company or any Subsidiary is bound or affected, or (iii) result in a violation of any law, rule, regulation, order, judgment, injunction, decree or other restriction of any court or governmental authority to which the Company or a Subsidiary is subject (including federal and state securities laws and regulations), or by which any property or asset of the Company or a Subsidiary is bound or affected; except in the case of each of clauses (ii) and (iii), such as could not, individually or in the aggregate, have or result in a Material Adverse Effect.

(e) Filings, Consents and Approvals. Neither the Company nor any Subsidiary is required to obtain any consent, waiver, authorization or order of, give any notice to, or make any filing or registration with, any court or other federal, state, local or other governmental authority or other Person in connection with the execution, delivery and performance by the Company of the Transaction Documents, other than (i) the filing with the Commission of the Registration Statement and the consent of the Commission to the effectiveness thereof, (ii) the notice and/or application(s) to each applicable Trading Market for the Shares for trading thereon in the time and manner required thereby and any required approvals of such Trading Market thereof, (iii) the filing of Form D with the Commission and applicable Blue Sky filings and (iv) the filings required pursuant to Section 4.3 hereunder (collectively, the “Required Approvals”).

(f) Issuance of the Notes and Shares. The Notes are duly authorized and, when issued in accordance with the applicable Transaction Documents, will be duly and validly issued. The Shares are duly authorized and, when issued and paid for in accordance with this Agreement, will be duly and validly issued, fully paid and non-assessable, free and clear of all Liens. Any Conversion Shares, when issued and paid for in accordance with the respective Notes, will be duly authorized and validly

issued, fully paid and nonassessable, free and clear of all Liens. Except for the securities sold under the Note and Restricted Stock Purchase Agreement, dated as of April 4, 2007 (the “Old Purchase Agreement”), by and among the Company and the Purchasers signatory thereto, the Company has not, and to the knowledge of the Company, no Affiliate of the Company has sold, offered for sale or solicited offers to buy or otherwise negotiated in respect of any security (as defined in Section 2 of the Securities Act) that would be integrated with the offer or sale of the Notes and Shares in a manner that would require the registration under the Securities Act of the sale of the Notes or the Shares to the Purchasers, or that would be integrated with the offer or sale of the Notes and the Shares for purposes of the rules and regulations of any Trading Market.

(g) Capitalization. The number of shares and type of all authorized, issued and outstanding capital stock of the Company as of March 8, 2007, and all shares of Common Stock reserved for issuance under the Company’s various option and incentive plans as of March 8, 2007, is set forth on Schedule 3.1(g) of the Disclosure Schedules attached hereto. No Person has any right of first refusal, preemptive right, right of participation, or any similar right to participate in the transactions contemplated by the Transaction Documents. Except as contemplated hereby and as set forth on Schedule 3.1(g), there are no outstanding options, warrants, script rights to subscribe to, calls or commitments of any character whatsoever relating to, or securities, rights or obligations convertible into or exchangeable for, or giving any Person any right to subscribe for or acquire, any shares of Common Stock, or contracts, commitments, understandings or arrangements by which the Company or any Subsidiary is or may become bound to issue additional shares of Common Stock, or securities or rights convertible or exchangeable into shares of Common Stock. The issuance and sale of the Notes, the Shares and the Conversion Shares will not obligate the Company to issue shares of Common Stock or other securities to any Person (other than the Purchasers) and will not result in a right of any holder of Company securities to adjust the exercise, conversion, exchange or reset price under such securities. Except as set forth on Schedule 3.1(g), all of the outstanding shares of capital stock of the Company are validly issued, fully paid and nonassessable, have been issued in compliance with all federal and state securities laws, and none of such outstanding shares was issued in violation of any preemptive rights or similar rights to subscribe for or purchase securities; provided that this sentence shall be limited to the Company’s knowledge with respect to any shares of the Company’s capital stock issued prior to May 4, 2005. No further approval or authorization of any stockholder, the Board of Directors of the Company or others is required for the issuance and sale of the Notes or Shares. Except as disclosed in the SEC Reports, there are no stockholders agreements, voting agreements or other similar agreements with respect to the Company’s capital stock to which the Company is a party or, to the knowledge of the Company, between or among any of the Company’s stockholders. Except as set forth on Schedule 3.1(g) and as contemplated by the Transaction Documents, the Company has not granted any registration or similar rights with respect to any security of the Company requiring the Company to register such securities of the Company.

(h) SEC Reports; Financial Statements. Except as otherwise disclosed in the SEC Reports, the Company has filed all reports required to be filed by it under the Exchange Act, including pursuant to Section 13(a) or 15(d) thereof, preceding the date hereof (or such shorter period as the Company was required by law to file such material) (the foregoing materials being collectively referred to herein as the “SEC Reports”) on a timely basis or has received a valid extension of such time of filing and has filed any such SEC Reports prior to the expiration of any such extension. All SEC Reports filed within the 10 days preceding the date hereof have been made available to the Purchasers. The SEC Reports filed since May 4, 2005 complied in all material respects with the requirements of the Securities Act and the Exchange Act and the rules and regulations of the Commission promulgated thereunder, and none of the SEC Reports filed since May 4, 2005, when filed, contained any untrue statement of a material fact or omitted to state a material fact required to be stated therein or necessary in order to make the statements therein, in light of the circumstances under which they were made, not misleading. The financial statements of the Company included in the SEC Reports comply in all material respects with applicable accounting requirements and the rules and regulations of the Commission with respect thereto as in effect at the time of filing. Such financial statements have been prepared in accordance with generally accepted accounting principles applied on a consistent basis during the periods involved (“GAAP”), except as may be otherwise specified in such financial statements or the notes thereto, and fairly present in all material respects the financial position of the Company and its consolidated subsidiaries as of and for the dates thereof and the results of operations and cash flows for the periods then ended, subject, in the case of unaudited statements, to normal year-end audit adjustments.

(i) Material Changes. Since the date of the latest audited financial statements included within the SEC Reports, except as disclosed in the SEC Reports: (i) there has been no event, occurrence or development that has had or that could result in a Material Adverse Effect, (ii) the Company has not incurred any liabilities (contingent or otherwise) other than (A) trade payables and accrued expenses incurred in the ordinary course of business consistent with past practice and (B) liabilities not required to be reflected in the Company’s financial statements pursuant to GAAP or required to be disclosed in filings made with the Commission, (iii) the Company has not altered its method of accounting or the identity of its auditors, (iv) the Company has not declared or made any dividend or distribution of cash or other property to its stockholders or purchased, redeemed or made any agreements to purchase or redeem any shares of its capital stock, and (v) the Company has not issued any equity securities to any officer, director or Affiliate, except pursuant to existing Company stock option or similar plans.

(j) Litigation. There is no action, suit, inquiry, notice of violation, proceeding or investigation pending or, to the knowledge of the Company, threatened against or affecting the Company, any Subsidiary or any of their respective properties before or by any court, arbitrator, governmental or administrative agency or regulatory authority (federal, state, county, local or foreign) (collectively, an “Action”) which: (i) except as disclosed in the SEC Reports, adversely affects or challenges the legality, validity or enforceability of any of the Transaction Documents, the Notes or the Shares or

(ii) could, if there were an unfavorable decision, individually or in the aggregate, have or reasonably be expected to result in a Material Adverse Effect. Neither the Company nor any Subsidiary, nor, to the knowledge of the Company, any director or officer thereof, is or has been the subject of any Action involving a claim of violation of or liability under federal or state securities laws or a claim of breach of fiduciary duty. The Company does not have pending before the Commission any request for confidential treatment of information. There has not been, and to the knowledge of the Company, there is not pending or contemplated, any investigation by the Commission involving the Company or any current or former director or officer of the Company. The Commission has not issued any stop order or other order suspending the effectiveness of any registration statement filed by the Company or any Subsidiary under the Exchange Act or the Securities Act.

(k) Compliance. Neither the Company nor any Subsidiary: (i) is in default under or in violation of (and no event has occurred that has not been waived that, with notice or lapse of time or both, would result in a default by the Company or any Subsidiary under), nor has the Company or any Subsidiary received notice of a claim that it is in default under or that it is in violation of, any indenture, loan or credit agreement or any other agreement or instrument to which it is a party or by which it or any of its properties is bound (whether or not such default or violation has been waived), (ii) is in violation of any order of any court, arbitrator or governmental body, or (iii) is or has been in violation of any statute, rule or regulation of any governmental authority, except in each case as could not, individually or in the aggregate, have or result in a Material Adverse Effect.

(l) Labor Relations. No material labor dispute exists or, to the knowledge of the Company, is imminent with respect to any of the employees of the Company.

(m) Regulatory Permits. Except as otherwise described in the SEC Reports, the Company and the Subsidiaries possess all certificates, authorizations and permits issued by the appropriate federal, state, local or foreign regulatory authorities necessary to conduct their respective businesses, except where the failure to possess such permits could not, individually or in the aggregate, have or reasonably be expected to result in a Material Adverse Effect (“Material Permits”), and neither the Company nor any Subsidiary has received any notice of proceedings relating to the revocation or modification of any Material Permit.

(n) Title to Assets. The Company and the Subsidiaries have good and marketable title in fee simple to all real property owned by them that is material to the business of the Company and the Subsidiaries and good and marketable title in all personal property owned by them that is material to the business of the Company and the Subsidiaries, in each case free and clear of all Liens, except for Liens as do not materially affect the value of such property and do not materially interfere with the use made and proposed to be made of such property by the Company and the Subsidiaries. Any real property and facilities held under lease by the Company and the Subsidiaries are held under valid, subsisting and enforceable leases of which the Company and the Subsidiaries are in compliance.

(o) Patents and Trademarks. The Company and the Subsidiaries have, or have rights to use, all patents, patent applications, trademarks, trademark applications, service marks, trade names, copyrights, licenses and other similar rights necessary or material for use in connection with their respective businesses as described in the SEC Reports and which the failure to so have could have a Material Adverse Effect (collectively, the “Intellectual Property Rights”). Neither the Company nor any Subsidiary has received a written notice that the Intellectual Property Rights used by the Company or any Subsidiary violates or infringes upon the rights of any Person. To the knowledge of the Company, all such Intellectual Property Rights are enforceable and there is no existing infringement by another Person of any of the Intellectual Property Rights.

(p) Insurance. The Company and the Subsidiaries are insured by insurers of recognized financial responsibility against such losses and risks and in such amounts as are prudent and customary for companies similarly situated with the Company in the businesses in which the Company and the Subsidiaries are engaged. To the Company’s knowledge, such insurance contracts and policies are accurate and complete. Neither the Company nor any Subsidiary has any reason to believe it will not be able to renew its existing insurance coverage as and when such coverage expires or to obtain similar coverage from similar insurers as may be necessary to continue its business without a significant increase in cost.

(q) Transactions With Affiliates and Employees. Except as required to be set forth in the SEC Reports, none of the officers or directors of the Company and, to the knowledge of the Company, none of the employees of the Company is presently a party to any transaction with the Company or any Subsidiary (other than for services as employees, officers and directors), including any contract, agreement or other arrangement providing for the furnishing of services to or by, providing for rental of real or personal property to or from, or otherwise requiring payments to or from any officer, director or such employee or, to the knowledge of the Company, any entity in which any officer, director, or any such employee has a substantial interest or is an officer, director, trustee or partner.

(r) Certain Fees. Except as set forth on Schedule 3.1(r), the Company has not engaged or retained any broker, financial advisor or consultant, finder, placement agent, investment banker, bank or other Person and has not agreed to pay any commissions or other fees to any of the same with respect to the transactions contemplated by this Agreement.

(s) Private Placement. Assuming the accuracy of the representations and warranties of the Purchasers set forth in Sections 3.2(b)-(f), the offer, issuance and sale of the Notes, the Shares and the Conversion Shares to the Purchasers as contemplated hereby are exempt from the registration requirements of the Securities Act and do not contravene the rules and regulations of the Trading Market.

(t) Listing and Maintenance Requirements. The Company’s Common Stock is registered pursuant to Section 12(g) of the Exchange Act, and the Company has taken no action designed to, or which to its knowledge is likely to have the effect of, terminating the registration of the Common Stock under the Exchange Act nor has the Company received any notification that the Commission is contemplating terminating such registration. The Company has not received notice from any Trading Market on which the Common Stock is or has been listed or quoted to the effect that the Company is not in compliance with the listing or maintenance requirements of such Trading Market. The Company is, and has no reason to believe that it will not in the foreseeable future continue to be, in compliance with all such listing and maintenance requirements.

(u) Tax Status. The Company and each of its Subsidiaries has made or filed all federal, state and foreign income and all other tax returns, reports and declarations required by any jurisdiction to which it is subject (unless and only to the extent that the Company and each of its Subsidiaries has set aside on its books provisions reasonably adequate for the payment of all unpaid and unreported taxes) and has paid all taxes and other governmental assessments and charges that are material in amount, shown or determined to be due on such returns, reports and declarations, except those being contested in good faith and has set aside on its books provisions reasonably adequate for the payment of all taxes for periods subsequent to the periods to which such returns, reports or declarations apply. There are no unpaid taxes in any material amount claimed to be due by the taxing authority of any jurisdiction, and the officers of the Company know of no basis for any such claim. The Company has not executed a waiver with respect to the statute of limitations relating to the assessment or collection of any foreign, federal, statue or local tax. None of the Company’s tax returns is presently being audited by any taxing authority.

(v) No General Solicitation or Advertising in Regard to this Transaction. Neither the Company nor, to the knowledge of the Company, any of its directors or officers (i) has conducted or will conduct any general solicitation (as that term is used in Rule 502(c) of Regulation D) or general advertising with respect to the sale and issuance of the Notes or the Shares, or (ii) made any offers or sales of any security or solicited any offers to buy any security under any circumstances that would require registration of the Notes or the Shares under the Securities Act or made any “directed selling efforts” as defined in Rule 902 of Regulation S.

(w) Foreign Corrupt Practices. Neither the Company, nor to the knowledge of the Company, any agent or other person acting on behalf of the Company, has (i) directly or indirectly, used any corrupt funds for unlawful contributions, gifts, entertainment or other unlawful expenses related to foreign or domestic political activity, (ii) made any unlawful payment to foreign or domestic government officials or employees or to any foreign or domestic political parties or campaigns from corporate funds, (iii) failed to disclose fully any contribution made by the Company (or made by

any person acting on its behalf of which the Company is aware) which is in violation of law, or (iv) violated in any material respect any provision of the Foreign Corrupt Practices Act of 1977, as amended.

(x) Sarbanes-Oxley. The Company is in material compliance with all provisions of the Sarbanes-Oxley Act of 2002 which are applicable to it as of each Closing Date, and the rules and regulations promulgated thereunder.

(y) Investment Company. The Company is not, and is not an Affiliate of, and immediately after receipt of payment for the Notes and the Shares, will not be or be an Affiliate of an “investment company” within the meaning of the Investment Company Act of 1940, as amended.

(z) No Integrated Offering. Assuming the accuracy of the Purchasers’ representations and warranties set forth in Section 3.2 and except for the securities offered in connection with the Old Purchase Agreement, neither the Company nor any of its Affiliates, nor any Person acting on its or their behalf has, directly or indirectly, made any offers or sales of any security or solicited any offers to buy any security, under circumstances that would cause this offering of the Securities to be integrated with prior offerings by the Company for purposes of the Securities Act or any applicable shareholder approval provisions, including, without limitation, under the rules and regulations of any exchange or automated quotation system on which any of the securities of the Company are listed or designated.

3.2 Representations and Warranties of the Purchasers. Each Purchaser hereby, for itself and for no other Purchaser, represents and warrants to the Company as follows:

(a) Organization; Authority. If the Purchaser is not an individual, such Purchaser is an entity duly organized, validly existing and in good standing under the laws of the jurisdiction of its organization with the requisite corporate or partnership power and authority to enter into and to consummate the transactions contemplated by the Transaction Documents and otherwise to carry out its obligations thereunder. If the Purchaser is not an individual, the purchase by such Purchaser of the Notes and Shares hereunder has been duly authorized by all necessary action on the part of such Purchaser. Each of this Agreement and the Registration Rights Agreement has been duly executed by such Purchaser if the Purchaser is not an individual, and when delivered by such Purchaser in accordance with the terms hereof, will constitute the valid and legally binding obligation of such Purchaser, enforceable against it in accordance with its terms except (i) as limited by applicable bankruptcy, insolvency, reorganization, moratorium and other laws of general application affecting enforcement of creditors’ rights generally and (ii) as limited by laws relating to the availability of specific performance, injunctive relief or other equitable remedies.

(b) Investment Intent. Such Purchaser is acquiring the Securities as principal for its own account and not with a view to or for distributing or reselling such Securities or any part thereof, without prejudice, however, to such Purchaser’s right,

subject to the provisions of this Agreement, at all times to sell or otherwise dispose of all or any part of such Securities pursuant to an effective registration statement under the Securities Act or under an exemption from such registration and in compliance with applicable federal and state securities laws. Nothing contained herein shall be deemed a representation or warranty by such Purchaser to hold Securities for any period of time or limit such Purchaser’s right to sell the Securities pursuant to the Registration Statement or otherwise in compliance with applicable federal and state securities laws. Such Purchaser is acquiring the Securities hereunder in the ordinary course of its business. Such Purchaser does not have any agreement or understanding, directly or indirectly, with any Person to distribute any of the Securities.

(c) Purchaser Status. At the time such Purchaser was offered the Securities, it was, and at the date hereof it is, an “accredited investor” as defined in Rule 501(a) under the Securities Act. If the Purchaser is not an individual, such Purchaser has not been formed solely for the purpose of acquiring the Securities. Such Purchaser is not a registered broker-dealer under Section 15 of the Exchange Act. Each Purchaser has delivered to the Company a complete and accurate Purchaser Questionnaire, the form of which is attached hereto as Exhibit C.

(d) Experience of such Purchaser. Such Purchaser, either alone or together with its representatives, has such knowledge, sophistication and experience in business and financial matters so as to be capable of evaluating the merits and risks of the prospective investment in the Securities, and has so evaluated the merits and risks of such investment. Such Purchaser is able to bear the economic risk of an investment in the Securities and, at the present time, is able to afford a complete loss of such investment.

(e) General Solicitation. Such Purchaser is not purchasing the Securities as a result of any advertisement, article, notice or other communication regarding the Securities published in any newspaper, magazine or similar media or broadcast over television or radio or presented at any seminar or any other general solicitation or general advertisement.

(f) SEC Reports. Such Purchaser has carefully read and reviewed the Company’s SEC Reports and has had the opportunity to ask questions of Company representatives regarding the contents of such SEC Reports. Each Purchaser has relied on the SEC Reports in conjunction with its investment decision-making process.

(g) Certain Fees. Such Purchaser has not engaged or retained any broker, financial advisor or consultant, finder, placement agent, investment banker, bank or other Person and has not agreed to pay any commissions or other fees to any of the same with respect to the transactions contemplated by this Agreement.

(h) Tax Advice. The Purchaser has relied on its own analysis and the advice of its tax or legal advisors. The Purchaser acknowledges that neither the Company nor the Company Counsel has provided nor intends to provide any advice regarding the tax consequences of the execution and delivery of the Transaction Documents.

ARTICLE IV

OTHER AGREEMENTS OF THE PARTIES

4.1 Transfer Restrictions.

(a) The Securities may only be disposed of in compliance with state and federal securities laws. In connection with any transfer of Securities other than pursuant to an effective registration statement or Rule 144, to the Company or in a non-sale transaction to an Affiliate of a Purchaser, the Company may require the transferor thereof to provide to the Company an opinion of counsel selected by the transferor and reasonably acceptable to the Company, the form and substance of which opinion shall be reasonably satisfactory to the Company, to the effect that such transfer does not require registration of such transferred Securities under the Securities Act.

(b) Each Purchaser, severally and not jointly with the other Purchasers, agrees to the imprinting, so long as is required by this Section 4.1(b), of the following legend on any certificate evidencing Securities:

THESE SECURITIES HAVE NOT BEEN REGISTERED WITH THE SECURITIES AND EXCHANGE COMMISSION OR THE SECURITIES COMMISSION OF ANY STATE IN RELIANCE UPON AN EXEMPTION FROM REGISTRATION UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES ACT”), AND, ACCORDINGLY, MAY NOT BE OFFERED OR SOLD EXCEPT PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES ACT OR PURSUANT TO AN AVAILABLE EXEMPTION FROM, OR IN A TRANSACTION NOT SUBJECT TO, THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT AND IN ACCORDANCE WITH APPLICABLE STATE SECURITIES LAWS AS EVIDENCED BY A LEGAL OPINION OF COUNSEL TO THE TRANSFEROR REASONABLY ACCEPTABLE TO THE COMPANY TO SUCH EFFECT, THE SUBSTANCE OF WHICH SHALL BE REASONABLY ACCEPTABLE TO THE COMPANY. THESE SECURITIES MAY BE PLEDGED IN CONNECTION WITH A BONA FIDE MARGIN ACCOUNT OR OTHER LOAN SECURED BY SUCH SECURITIES.

The Company acknowledges and agrees that a Purchaser may from time to time pledge pursuant to a bona fide margin agreement or grant a security interest in some or all of the Securities to a financial institution that is an “accredited investor” as defined in Rule 501(a) under the Securities Act and, if required under the terms of such arrangement, such Purchaser may transfer pledged or secured Securities to the pledgees or secured parties. Such pledge or transfer would not be subject to approval of the Company and no legal opinion of legal counsel of the pledgee, secured party or pledgor shall be required in

connection therewith. Further, no notice shall be required of such pledge. At the appropriate Purchaser’s expense, the Company will execute and deliver such reasonable documentation as a pledgee or secured party of Securities may reasonably request in connection with a pledge or transfer of the Securities, including the preparation and filing of any required prospectus supplement under Rule 424(b)(3) of the Securities Act or other applicable provision of the Securities Act to appropriately amend the list of Selling Stockholders thereunder.

(c) The Company agrees that following such time as such legend is no longer required, it will, no later than ten Trading Days following the delivery by a Purchaser to the Company or the Company’s transfer agent of a certificate representing the Shares or the Conversion Shares, as applicable, issued with a restrictive legend (such third Trading Day, the “Legend Removal Date”), together with all necessary documentation relating to the legend removal request, deliver or cause to be delivered to such Purchaser a certificate representing such shares that is free from all restrictive and other legends. The Company may not make any notation on its records or give instructions to any transfer agent of the Company that enlarge the restrictions on transfer set forth in this Section.

4.2 Conversion Procedures. The terms of the Notes set forth the totality of the procedures required of the Purchasers in order to convert the Notes. No additional legal opinion or other information or instructions shall be required of the Purchasers to convert their Notes. The Company shall honor conversions of the Notes and shall deliver Next Securities (as that term is defined in the Notes) or Conversion Shares in accordance with the terms, conditions and time periods set forth in the Notes.

4.3 Securities Laws Disclosure; Publicity. The Company shall issue a press release or file a Current Report on Form 8-K disclosing all material terms of the transactions contemplated hereby. Notwithstanding the foregoing, other than in any registration statement filed pursuant to the Registration Rights Agreement, the filings related thereto and as the Company determines is required in order to comply with any applicable law, the Company shall not publicly disclose the name of any Purchaser, or include the name of any Purchaser in any filing with the Commission or any regulatory agency or Trading Market, without the prior written consent of such Purchaser, except to the extent such disclosure is required by law or Trading Market regulations, in which case the Company shall provide each Purchaser with prior notice of such disclosure.

4.4 Use of Proceeds. The Company shall use the net proceeds from the sale of the Notes and Shares hereunder for working capital and general corporate purposes. Unless otherwise approved pursuant to Section 4.8, the net proceeds shall not be used for the purpose (i) of declaring or paying any dividends or make any distribution of any kind on the Company’s capital stock or (ii) of paying the principal amount due pursuant to the convertible secured promissory notes issued pursuant to the Old Purchase Agreement prior to the date such amounts become due.

4.5 Confidentiality. Each Purchaser agrees that he, she or it will keep confidential and will not disclose, divulge or use for any purpose other than to monitor his, her or its investment in the Company any confidential, proprietary or secret information which such Purchaser may obtain from the Company pursuant to financial statements, reports and other materials submitted by the Company to such Purchaser pursuant to this Agreement or otherwise (but not including the SEC Reports) (“Confidential Information”), unless such Confidential Information is known, or until such Confidential Information becomes known, to the public (other than as a result of a breach of this Section 4.5 by such Purchaser); provided, however, that a Purchaser may disclose Confidential Information (i) to his, her or its attorneys, accountants, consultants, and other professionals to the extent necessary to obtain their services in connection with monitoring his, her or its investment in the Company, or (ii) as may otherwise be required by law, provided that the Purchaser takes reasonable steps to minimize the extent of any such required disclosure.

4.6 Furnishing of Information. As long as any Purchaser owns Securities, the Company covenants to timely file (or obtain extensions in respect thereof and file within the applicable grace period) all reports required to be filed by the Company after the date hereof pursuant to the Exchange Act.

4.7 Prohibited Transactions. During the last thirty (30) days prior to the date hereof or the date of any conversion of a Note, neither the Purchaser party hereto or holding such Note nor any Affiliate of such Purchaser which (x) had knowledge of the transactions contemplated hereby and thereby, (y) has or shares discretion relating to such Purchaser’s investments or trading or information concerning such Purchaser’s investments, including in respect of the Securities, or (z) is subject to such Purchaser’s review or input concerning such Affiliate’s investments or trading (collectively, “Trading Affiliates”) has, directly or indirectly, effected or agreed to effect any short sale, whether or not against the box, established any “put equivalent position” (as defined in Rule 16a-1(h) under the Exchange Act) with respect to the Shares or the Conversion Shares, granted any other right (including, without limitation, any put or call option) with respect to the Shares or the Conversion Shares or with respect to any security that includes, relates to or derived any significant part of its value from the Shares or the Conversion Shares or otherwise sought to hedge its position in the Securities (each, a “Prohibited Transaction”). In the case of a Prohibited Transaction involving the Shares, prior to the earliest to occur of (i) the termination of this Agreement, or (ii) the Effective Date (as that term is defined in the Registration Rights Agreement) such Purchaser shall not, and shall cause its Trading Affiliates not to, engage, directly or indirectly, in a Prohibited Transaction. In the case of a Prohibited Transaction involving the Conversion Shares, prior to the conversion of such Note, the Purchaser shall not, and shall cause its Trading Affiliates not to, engage, directly or indirectly, in a Prohibited Transaction. Such Purchaser acknowledges that the representations, warranties and covenants contained in this Section 4.7 are being made for the benefit of the Purchasers as well as the Company and that each of the other Purchasers shall have an independent right to assert any claims against such Purchaser arising out of any breach or violation of the provisions of this Section 4.7.

4.8 Additional Debt; Dividends. After the date of this Agreement, the Company shall not, without first obtaining the prior written consent of the Purchasers holding, together, a majority of the outstanding aggregate Loan Amount of the Notes issued hereunder, with such adjustments to the Loan Amount as may be made from time to time pursuant to Section 7(a)(i) of such Notes, (i) incur any additional indebtedness other than in the ordinary course of business, (ii) declare or pay any dividends or make any distribution of any kind on the Company’s capital stock, nor (iii) pay the principal amount due pursuant to the convertible secured promissory notes issued pursuant to the Old Purchase Agreement prior to the date such amounts become due.

ARTICLE V

MISCELLANEOUS

5.1 Fees and Expenses. The parties shall be responsible for their own legal and other expenses, if any, in connection with this transaction.

5.2 Entire Agreement. The Transaction Documents, together with the exhibits and schedules thereto, contain the entire understanding of the parties with respect to the subject matter hereof and supersede all prior agreements and understandings, oral or written, with respect to such matters, which the parties acknowledge have been merged into such documents, exhibits and schedules.

5.3 Notices. Any and all notices or other communications or deliveries required or permitted to be provided hereunder shall be in writing and shall be deemed given and effective on the earliest of (a) the date of transmission, if such notice or communication is delivered via facsimile or electronic mail at the facsimile number or the electronic mail address specified on the signature page attached hereto prior to 5:30 p.m. Eastern time on a Trading Day and, with respect to a notice delivered via facsimile, an electronic confirmation of delivery is received by the sender, (b) the next Trading Day after the date of transmission, if such notice or communication is delivered via facsimile or electronic mail at the facsimile number or electronic mail address specified in this Section on a day that is not a Trading Day or later than 5:30 p.m. Eastern time on any Trading Day, (c) the next Trading Day following the date of mailing, if sent by U.S. nationally recognized overnight courier service, or (d) upon actual receipt by the party to whom such notice is required to be given. The addresses for such notices and communications are those set forth on the signature pages hereof, or such other address as may be designated in writing hereafter, in the same manner, by such Person.

5.4 Amendments; Waivers. No provision of this Agreement may be waived or amended except in a written instrument signed by the Company and the Purchasers holding, together, a majority of the outstanding aggregate Loan Amount of the Notes issued hereunder, with such adjustments to the Loan Amount as may be made from time to time pursuant to Section 7(a)(i) of the such Notes. No waiver of any default with respect to any provision, condition or requirement of this Agreement shall be deemed to

be a continuing waiver in the future or a waiver of any subsequent default or a waiver of any other provision, condition or requirement hereof, nor shall any delay or omission of either party to exercise any right hereunder in any manner impair the exercise of any such right.

5.5 Construction. The headings herein are for convenience only, do not constitute a part of this Agreement and shall not be deemed to limit or affect any of the provisions hereof. The language used in this Agreement will be deemed to be the language chosen by the parties to express their mutual intent, and no rules of strict construction will be applied against any party.

5.6 Successors and Assigns. This Agreement shall be binding upon and inure to the benefit of the parties and their successors and permitted assigns. The Company may not assign this Agreement or any rights or obligations hereunder without the prior written consent of the Purchasers. Any Purchaser may assign its rights under this Agreement and the Registration Rights Agreement to any Person to whom such Purchaser assigns or transfers any Securities as long as such Purchaser provides prompt notice to the Company.

5.7 No Third-Party Beneficiaries. This Agreement is intended for the benefit of the parties hereto and their respective successors and permitted assigns and is not for the benefit of, nor may any provision hereof be enforced by, any other Person.

5.8 Governing Law; Venue; Waiver of Jury Trial. All questions concerning the construction, validity, enforcement and interpretation of the Transaction Documents shall be governed by and construed and enforced in accordance with the internal laws of the State of Virginia, without regard to the principles of conflicts of law thereof. Each party agrees that all legal proceedings concerning the interpretations, enforcement and defense of the transactions contemplated by this Agreement and any other Transaction Documents (whether brought against a party hereto or its respective affiliates, directors, officers, shareholders, employees or agents) shall be commenced exclusively in the state and federal courts sitting in the City of Roanoke. Each party hereby irrevocably submits to the exclusive jurisdiction of the state and federal courts sitting in the City of Roanoke, County of Roanoke, for the adjudication of any dispute hereunder or in connection herewith or with any transaction contemplated hereby or discussed herein (including with respect to the enforcement of any of the Transaction Documents), and hereby irrevocably waives, and agrees not to assert in any suit, action or proceeding, any claim that it is not personally subject to the jurisdiction of any such court, that such suit, action or proceeding is improper or inconvenient venue for such proceeding. Each party hereby irrevocably waives personal service of process and consents to process being served in any such suit, action or proceeding by mailing a copy thereof via registered or certified mail or overnight delivery (with evidence of delivery) to such party at the address in effect for notices to it under this Agreement and agrees that such service shall constitute good and sufficient service of process and notice thereof. Nothing contained herein shall be deemed to limit in any way any right to serve process in any manner permitted by law. The parties hereby waive all rights to a trial by jury. If either party shall commence an

action or proceeding to enforce any provisions of the Transaction Documents, then the prevailing party in such action or proceeding shall be reimbursed by the other party for its attorneys’ fees and other costs and expenses incurred with the investigation, preparation and prosecution of such action or proceeding.

5.9 Survival. The representations and warranties contained herein shall survive for a period of one year following the Closing.

5.10 Execution. This Agreement may be executed in two or more counterparts, all of which when taken together shall be considered one and the same agreement and shall become effective when counterparts have been signed by each party and delivered to the other party, it being understood that both parties need not sign the same counterpart. In the event that any signature is delivered by facsimile transmission, such signature shall create a valid and binding obligation of the party executing (or on whose behalf such signature is executed) such document with the same force and effect as if such facsimile signature page were an original thereof.

5.11 Severability. If any provision of this Agreement is held to be invalid or unenforceable in any respect, the validity and enforceability of the remaining terms and provisions of this Agreement shall not in any way be affected or impaired thereby and the parties will attempt to agree upon a valid and enforceable provision that is a reasonable substitute therefore, and upon so agreeing, shall incorporate such substitute provision in this Agreement.

5.12 Replacement of Securities. If any certificate or instrument evidencing any Securities is mutilated, lost, stolen or destroyed, the Company shall issue or cause to be issued in exchange and substitution for and upon cancellation thereof, or in lieu of and substitution therefor, a new certificate or instrument, but only upon receipt of evidence reasonably satisfactory to the Company of such loss, theft or destruction and customary and reasonable indemnity, if requested.

5.13 Independent Nature of Purchasers’ Obligations and Rights. The obligations of each Purchaser under any Transaction Document are several and not joint with the obligations of any other Purchaser, and no Purchaser shall be responsible in any way for the performance of the obligations of any other Purchaser under any Transaction Document. Nothing contained herein or in any Transaction Document, and no action taken by any Purchaser pursuant thereto, shall be deemed to constitute the Purchasers as a partnership, an association, a joint venture or any other kind of entity, or create a presumption that the Purchasers are in any way acting in concert or as a group with respect to such obligations or the transactions contemplated by the Transaction Documents. Each Purchaser shall be entitled to independently protect and enforce its rights, including without limitation, the rights arising out of this Agreement or out of the other Transaction Documents, and it shall not be necessary for any other Purchaser to be joined as an additional party in any proceeding for such purpose. Each Purchaser has been represented by its own separate legal counsel in their review and negotiation of the Transaction Documents. The Company has elected to provide all Purchasers with the same terms and Transaction Documents for the convenience of the Company and not because it was required or requested to do so by the Purchasers.

(Signature Pages Follow)

IN WITNESS WHEREOF, the parties hereto have caused this Note and Restricted Stock Purchase Agreement to be duly executed by their respective authorized signatories as of the date first indicated above.

With a copy to (which shall not constitute notice):

Jeremy D. Glaser, Esq.

Morrison & Foerster, LLP

12531 High Bluff Drive

Suite 100

San Diego, CA 92130

Phone: (858)  ###-###-####

Fax: (858)  ###-###-####

e-mail: ***@***

[PURCHASER SIGNATURE PAGES TO NOTE AND RESTRICTED STOCK PURCHASE AGREEMENT]

IN WITNESS WHEREOF, the undersigned have caused this Note and Restricted Stock Purchase Agreement to be duly executed by their respective authorized signatories as of the date first indicated above.

Name of Investing Entity or Individual:                                                                                  

Signature of Authorized Signatory of Investing Entity:                                                                                  

Name of Authorized Signatory if not an Individual:                                                                                  

Title of Authorized Signatory if not an Individual                                                                                  

Email Address of Authorized Entity or Individual:                                                                                  

Address for Notice of Investing Entity or Individual:

Address for Delivery of Securities for Investing Entity or Individual (if not same as above):

Purchase Price:

Loan Amount:

Shares:

EIN or SSN Number: [PROVIDE THIS UNDER SEPARATE COVER]

[SIGNATURE PAGES CONTINUE]

EXHIBIT A

FORM OF SECURED CONVERTIBLE PROMISSORY NOTE

EXHIBIT B

REGISTRATION RIGHTS AGREEMENT

EXHIBIT C

PURCHASER QUESTIONNAIRE

The Purchaser represents and warrants that he, she or it comes within one category marked below, and that for any category marked, he, she or it has truthfully set forth, where applicable, the factual basis or reason the Purchaser comes within that category. ALL INFORMATION IN RESPONSE TO THIS SECTION WILL BE KEPT STRICTLY CONFIDENTIAL. The undersigned agrees to furnish any additional information which the Company deems necessary in order to verify the answers set forth below.

SUITABILITY (please answer each question)

YES                                         NO

YES                                         NO

YES                                         NO

YES                                         NO

YES                                         NO

YES                                         NO

MANNER IN WHICH TITLE IS TO BE HELD, (circle one)

NASD AFFILIATION.

Are you affiliated or associated with an NASD member firm (please check one):

YES                                         NO

If Yes, please describe:

The undersigned NASD member firm acknowledges receipt of the notice required by Article 3, Sections 28(a) and (b) of the Rules of Fair Practice.

The above information is true, complete and accurate in all material respects and the undersigned recognizes that the Company is relying on the truth, completeness and accuracy of such information in determining whether the offering of the Shares and Notes meets the requirements for the exemption from registration contained in Section 4(2) of the U.S. Securities Act of 1933, as amended, and/or Regulation D promulgated by the Securities and Exchange Commission, and similar exemptions under applicable state securities laws or the applicable laws of other relevant jurisdictions.

The undersigned agrees to notify the Company promptly of any material changes in the foregoing information or any event resulting in the omission of any statement required to be made herein that occurs prior to the acceptance of the subscription to which this Questionnaire relates.

Executed at                                                              , on                                         , 2007.