ALIEN TECHNOLOGY CORPORATION 2006 EQUITY INCENTIVE PLAN

Exhibit 10.4

ALIEN TECHNOLOGY CORPORATION

2006 EQUITY INCENTIVE PLAN

RESTRICTED STOCK PURCHASE AGREEMENT

Unless otherwise defined herein, the terms defined in the 2006 Equity Incentive Plan (the “Plan”) will have the same defined meanings in this Restricted Stock Purchase Agreement (the “Agreement”).

Name:

The undersigned Purchaser has been granted a right to purchase Common Stock of the Company, subject to the terms and conditions of the Plan and this Agreement, as follows:

YOU MUST EXERCISE THIS STOCK PURCHASE RIGHT BEFORE THE EXPIRATION DATE OR IT WILL TERMINATE AND YOU WILL HAVE NO FURTHER RIGHT TO PURCHASE THE SHARES.

Non-Transferability of Stock Purchase Right.

This Stock Purchase Right may not be transferred in any manner otherwise than by will or by the laws of descent or distribution and may be exercised during the lifetime of Purchaser only by Purchaser. The terms of the Plan and this Agreement will be binding upon the executors, administrators, heirs, successors and assigns of the Purchaser.

1. Sale of Stock. The Company hereby agrees to sell to the individual named in the Notice of Grant of Stock Purchase Right (the “Purchaser”), and the Purchaser hereby agrees to purchase the number of Shares set forth in the Notice of Grant of Stock Purchase Right, at the exercise price per share set forth in the Notice of Grant of Stock Purchase Right (the “Exercise Price”), and subject to the terms and conditions of the Plan, which is incorporated herein by

reference. Subject to Section 19(c) of the Plan, in the event of a conflict between the terms and conditions of the Plan and this Agreement, the terms and conditions of the Plan will prevail.

2. Payment of Purchase Price. Purchaser herewith delivers to the Company the aggregate Exercise Price for the Shares by cash or check, together with any and all withholding taxes due in connection with the purchase of the Shares.

3. Purchaser’s Representations. In the event the Shares have not been registered under the Securities Act of 1933, as amended, at the time this Stock Purchase Right is exercised, the Purchaser will, if required by the Company, concurrently with the exercise of all or any portion of this Stock Purchase Right, deliver to the Company his or her Investment Representation Statement in the form attached hereto as Exhibit B.

4. Repurchase Option.

(a) In the event the Purchaser’s continuous status as a Service Provider terminates for any or no reason (including death or Disability), the Company will, upon the date of such termination (as reasonably fixed and determined by the Company), have an irrevocable, exclusive option for a period of ninety (90) days from such date to repurchase up to that number of Shares which constitute the Unreleased Shares (as defined in Section 5) at the Exercise Price per share (the “Repurchase Price”) (the “Repurchase Option”).

(b) The Repurchase Option will be exercised by the Company by delivering written notice to the Purchaser or the Purchaser’s executor (with a copy to the Escrow Holder (as defined in Section 7)) AND, at the Company’s option, (i) by delivering to the Purchaser or the Purchaser’s executor a check in the amount of the aggregate Repurchase Price, or (ii) by the Company canceling an amount of the Purchaser’s indebtedness to the Company equal to the aggregate Repurchase Price, or (iii) by a combination of (i) and (ii) so that the combined payment and cancellation of indebtedness equals such aggregate Repurchase Price. Upon delivery of such notice and the payment of the aggregate Repurchase Price in any of the ways described above, the Company will become the legal and beneficial owner of the Unreleased Shares being repurchased and all rights and interests therein or relating thereto, and the Company will have the right to retain and transfer to its own name the number of Unreleased Shares being repurchased by the Company.

(c) Whenever the Company will have the right to repurchase the Unreleased Shares hereunder, the Company may designate and assign one or more employees, officers, directors or shareholders of the Company or other persons or organizations to exercise all or a part of the Company’s Repurchase Option to purchase all or a part of the Unreleased Shares. If the Fair Market Value of the Unreleased Shares to be repurchased on the date of such designation or assignment (the “Repurchase FMV”) exceeds the aggregate Repurchase Price of the Unreleased Shares, then each such designee or assignee will pay the Company cash equal to the difference between the Repurchase FMV and the aggregate Repurchase Price of Unreleased Shares to be purchased.

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(d) If the Company or its assignee does not elect to exercise the Repurchase Option conferred above by giving the requisite notice within ninety (90) days following Purchaser’s termination as a Service Provider, the Repurchase Option will terminate.

5. Release of Shares From Repurchase Option.

(a) Subject to any accelerated vesting provisions in the Plan, [1/4^th of the Shares subject to the Repurchase Option will be released on the first anniversary of the Vesting Commencement Date and 1/48 of the Shares subject to the Repurchase Option will be released monthly thereafter] (as set forth in the Notice of Grant of Stock Purchase Right), subject to Purchaser continuing to be a Service Provider through each such date.

(b) Any of the Shares which have not yet been released from the Company’s Repurchase Option are referred to herein as “Unreleased Shares.”

(c) The Shares which have been released from the Company’s Repurchase Option will be delivered to the Purchaser at the Purchaser’s request (see Section 7).

6. Restriction on Transfer. Except for the escrow described in Section 7 or transfer of the Shares to the Company or its assignees contemplated by this Agreement, none of the Shares or any beneficial interest therein will be transferred, encumbered or otherwise disposed of in any way until the release of such Shares from the Company’s Repurchase Option in accordance with the provisions of this Agreement, other than by will or the laws of descent and distribution.

7. Escrow of Shares.

(a) To ensure the availability for delivery of the Purchaser’s Unreleased Shares upon exercise of the Repurchase Option by the Company, the Purchaser will, upon execution of this Agreement, deliver and deposit with an escrow holder designated by the Company (the “Escrow Holder”) the share certificates representing the Unreleased Shares, together with the Assignment Separate from Certificate (the “Stock Assignment”) duly endorsed in blank, attached hereto as Exhibit A-1. The Unreleased Shares and Stock Assignment will be held by the Escrow Holder, pursuant to the Joint Escrow Instructions of the Company and Purchaser attached as Exhibit A-2 hereto, until such time as the Company’s Repurchase Option expires.

(b) The Escrow Holder will not be liable for any act it may do or omit to do with respect to holding the Unreleased Shares in escrow and while acting in good faith and in the exercise of its judgment.

(c) If the Company or any assignee exercises its Repurchase Option hereunder, the Escrow Holder, upon receipt of written notice of such option exercise from the proposed transferee, will take all steps necessary to accomplish such transfer.

(d) When the Repurchase Option has been exercised or expires unexercised or a portion of the Shares has been released from such Repurchase Option, upon Purchaser’s request the

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Escrow Holder will promptly cause a new certificate to be issued for such released Shares and will deliver such certificate to the Company or the Purchaser, as the case may be.

(e) Subject to the terms hereof, the Purchaser will have all the rights of a shareholder with respect to such Shares while they are held in escrow, including without limitation, the right to vote the Shares and receive any cash dividends declared thereon. If, from time to time during the term of the Company’s Repurchase Option, there is (i) any stock dividend, stock split or other change in the Shares, or (ii) any merger or sale of all or substantially all of the assets or other acquisition of the Company, any and all new, substituted or additional securities to which the Purchaser is entitled by reason of the Purchaser’s ownership of the Shares will be immediately subject to this escrow, deposited with the Escrow Holder and included thereafter as “Shares” for purposes of this Agreement and the Company’s Repurchase Option.

8. Company’s Right of First Refusal. Subject to Section 6, before any Shares held by Purchaser or any transferee (either being sometimes referred to herein as the “Holder”) may be sold or otherwise transferred (including transfer by gift or operation of law), the Company or its assignee(s) will have a right of first refusal to purchase the Shares on the terms and conditions set forth in this Section (the “Right of First Refusal”).

(a) Notice of Proposed Transfer. The Holder of the Shares will deliver to the Company a written notice (the “Notice”) stating: (i) the Holder’s bona fide intention to sell or otherwise transfer such Shares; (ii) the name of each proposed purchaser or other transferee (“Proposed Transferee”); (iii) the number of Shares to be transferred to each Proposed Transferee; and (iv) the bona fide cash price or other consideration for which the Holder proposes to transfer the Shares (the “Offered Price”), and the Holder will offer the Shares at the Offered Price to the Company or its assignee(s).

(b) Exercise of Right of First Refusal. At any time within thirty (30) days after receipt of the Notice, the Company and/or its assignee(s) may, by giving written notice to the Holder, elect to purchase all, but not less than all, of the Shares proposed to be transferred to any one or more of the Proposed Transferees, at the purchase price determined in accordance with subsection (c) below.

(c) Purchase Price. The purchase price (“Purchase Price”) for the Shares purchased by the Company or its assignee(s) under this Section will be the Offered Price. If the Offered Price includes consideration other than cash, the cash equivalent value of the non-cash consideration will be determined by the Board of Directors of the Company in good faith.

(d) Payment. Payment of the Purchase Price will be made, at the option of the Company or its assignee(s), (i) by cash or check, (ii) by cancellation of all or a portion of any outstanding indebtedness of the Holder to the Company (or, in the case of repurchase by an assignee, to the assignee), or (iii) by any combination thereof within thirty (30) days after receipt of the Notice or in the manner and at the times set forth in the Notice.

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(e) Holder’s Right to Transfer. If all of the Shares proposed in the Notice to be transferred to a given Proposed Transferee are not purchased by the Company and/or its assignee(s) as provided in this Section, then the Holder may sell or otherwise transfer such Shares to that Proposed Transferee at the Offered Price or at a higher price, provided that such sale or other transfer is consummated within ninety (90) days after the date of the Notice and provided further that any such sale or other transfer is effected in accordance with any applicable securities laws and the Proposed Transferee agrees in writing that the provisions of this Section will continue to apply to the Shares in the hands of such Proposed Transferee. If the Shares described in the Notice are not transferred to the Proposed Transferee within such period, a new Notice will be given to the Company, and the Company and/or its assignees will again be offered the Right of First Refusal before any Shares held by the Holder may be sold or otherwise transferred.

(f) Exception for Certain Family Transfers. Anything to the contrary contained in this Section notwithstanding, the transfer of any or all of the Shares during the Purchaser’s lifetime or on the Purchaser’s death by will or intestacy to the Purchaser’s immediate family or a trust for the benefit of the Purchaser’s immediate family will be exempt from the provisions of this Section, provided that the Purchaser notifies the Company in writing within thirty (30) days of said transfer. “Immediate Family” as used herein will mean spouse, lineal descendant or antecedent, father, mother, brother or sister. In such case, the transferee or other recipient will receive and hold the Shares so transferred subject to the provisions of this Agreement, including but not limited to this Section 8 and Section 4, and there will be no further transfer of such Shares except in accordance with the terms of this Section.

(g) Termination of Right of First Refusal. The Right of First Refusal will terminate as to any Shares upon the earlier of (i) the first sale of Common Stock of the Company to the general public, or (ii) a Change in Control in which the successor corporation has equity securities that are publicly traded.

9. Restrictive Legends; Stop-Transfer Orders; Refusal to Transfer.

(a) Purchaser understands and agrees that the Company will cause the legends set forth below or legends substantially equivalent thereto, to be placed upon any certificate(s) evidencing ownership of the Shares together with any other legends that may be required by the Company or by applicable state or federal securities laws:

THE SECURITIES REPRESENTED HEREBY HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933 (THE “ACT”) AND MAY NOT BE OFFERED, SOLD OR OTHERWISE TRANSFERRED, PLEDGED OR HYPOTHECATED UNLESS AND UNTIL REGISTERED UNDER THE ACT OR, IN THE OPINION OF COUNSEL SATISFACTORY TO THE ISSUER OF THESE SECURITIES, SUCH OFFER, SALE OR TRANSFER, PLEDGE OR HYPOTHECATION IS IN COMPLIANCE THEREWITH.

THE SHARES REPRESENTED BY THIS CERTIFICATE ARE SUBJECT TO CERTAIN RESTRICTIONS ON TRANSFER, A RIGHT OF FIRST REFUSAL,

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AND A REPURCHASE OPTION HELD BY THE ISSUER OR ITS ASSIGNEE(S) AS SET FORTH IN THE RESTRICTED STOCK PURCHASE AGREEMENT BETWEEN THE ISSUER AND THE ORIGINAL HOLDER OF THESE SHARES, A COPY OF WHICH MAY BE OBTAINED AT THE PRINCIPAL OFFICE OF THE ISSUER. SUCH TRANSFER RESTRICTIONS, RIGHT OF FIRST REFUSAL AND REPURCHASE OPTION ARE BINDING ON TRANSFEREES OF THESE SHARES.

THE SHARES REPRESENTED BY THIS CERTIFICATE ARE SUBJECT TO RESTRICTION ON TRANSFER FOR A PERIOD OF 180 DAYS FOLLOWING THE EFFECTIVE DATE OF THE COMPANY’S INITIAL UNDERWRITTEN PUBLIC OFFERING AND MAY NOT BE SOLD OR OTHERWISE DISPOSED OF BY THE HOLDER WITHOUT THE CONSENT OF THE COMPANY OR THE MANAGING UNDERWRITER.

(b) Stop-Transfer Notices. Purchaser agrees that, in order to ensure compliance with the restrictions referred to herein, the Company may issue appropriate “stop transfer” instructions to its transfer agent, if any, and that, if the Company transfers its own securities, it may make appropriate notations to the same effect in its own records.

(c) Refusal to Transfer. The Company will not be required (i) to transfer on its books any Shares that have been sold or otherwise transferred in violation of any of the provisions of this Agreement or (ii) to treat as owner of such Shares or to accord the right to vote or pay dividends to any purchaser or other transferee to whom such Shares will have been so transferred.

10. Lock-Up Period. Purchaser hereby agrees that Purchaser will not offer, pledge, sell, contract to sell, sell any option or contract to purchase, purchase any option or contract to sell, grant any option, right or warrant to purchase, lend, or otherwise transfer or dispose of, directly or indirectly, any Common Stock (or other securities, including, without limitation, the Shares) of the Company or enter into any swap, hedging or other arrangement that transfers to another, in whole or in part, any of the economic consequences of ownership of any Common Stock (or other securities) of the Company held by Purchaser (other than those included in the registration) for a period specified by the representative of the underwriters of Common Stock (or other securities) of the Company not to exceed one hundred eighty (180) days following the effective date of a registration statement of the Company filed under the Securities Act.

Purchaser agrees to execute and deliver such other agreements as may be reasonably requested by the Company or the underwriter which are consistent with the foregoing or which are necessary to give further effect thereto. In addition, if requested by the Company or the representative of the underwriters of Common Stock (or other securities) of the Company, Purchaser will provide, within ten (10) days of such request, such information as may be required by the Company or such representative in connection with the completion of any public offering of the Company’s securities pursuant to a registration statement filed under the Securities Act. The obligations described in this Section will not apply to a registration relating solely to employee benefit plans on Form S-1 or Form S-8 or similar forms that may be promulgated in the future, or a

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registration relating solely to a Commission Rule 145 transaction on Form S-4 or similar forms that may be promulgated in the future. The Company may impose stop-transfer instructions with respect to the shares of Common Stock (or other securities) subject to the foregoing restriction until the end of said one hundred eighty (180) day period. Purchaser agrees that any transferee of any Option will be bound by this Section.

11. Tax Consequences. Set forth below is a brief summary as of the date of grant of this Stock Purchase Right of some of the federal tax consequences of exercise of this Stock Purchase Right and disposition of the Shares. THIS SUMMARY IS NECESSARILY INCOMPLETE, AND THE TAX LAWS AND REGULATIONS ARE SUBJECT TO CHANGE.

Generally, no income will be recognized by Purchaser in connection with the exercise of the stock purchase right for shares subject to the Repurchase Option, if an election under Section 83(b) of the Code is filed with the Internal Revenue Service within thirty (30) days of the date of exercise of the right to purchase stock. The form for making this election is attached as Exhibit A-3 hereto. Otherwise, as the Company’s repurchase right lapses, Purchaser will recognize compensation income in an amount equal to the difference between the Fair Market Value of the stock at the time the Company’s repurchase right lapses and the amount paid for the stock, if any (the “Spread”). If Purchaser is an Employee or former Employee, the Spread will be subject to tax withholding by the Company, and the Company will be entitled to a tax deduction in the amount at the time the Purchaser recognizes ordinary income with respect to a Stock Purchase Right. Purchaser agrees to make appropriate arrangements with the Company (or the Parent or Subsidiary employing or retaining Purchaser) for the satisfaction of all Federal, state, and local income and employment tax withholding requirements applicable to the purchase of Shares hereunder. Purchaser acknowledges and agrees that the Company may refuse to honor the exercise and refuse to deliver Shares if such withholding amounts are not delivered at the time of purchase.

The Administrator, in its sole discretion and pursuant to such procedures as it may specify from time to time, may permit the Purchaser to satisfy such tax withholding obligation, in whole or in part by one or more of the following (without limitation): (i) paying cash, (ii) electing to have the Company withhold otherwise deliverable Shares having a Fair Market Value equal to the minimum amount required to be withheld, (iii) delivering to the Company already vested and owned Shares having a Fair Market Value equal to the amount required to be withheld, or (iv) selling a sufficient number of such Shares otherwise deliverable to Purchaser such means as the Company may determine in its sole discretion (whether through a broker or otherwise) equal to the amount required to be withheld.

PURCHASER ACKNOWLEDGES THAT IT IS THE PURCHASER’S SOLE RESPONSIBILITY AND NOT THE COMPANY’S TO FILE TIMELY THE ELECTION UNDER SECTION 83(b), EVEN IF THE PURCHASER REQUESTS THE COMPANY OR ITS REPRESENTATIVES TO MAKE THIS FILING ON THE PURCHASER’S BEHALF.

12. No Guarantee of Continued Service. PURCHASER ACKNOWLEDGES AND AGREES THAT THE RELEASE OF SHARES FROM THE REPURCHASE OPTION OF THE COMPANY PURSUANT TO SECTION 5 HEREOF IS EARNED ONLY BY CONTINUING

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SERVICE AS SERVICE PROVIDER AT THE WILL OF THE COMPANY (NOT THROUGH THE ACT OF BEING HIRED OR PURCHASING SHARES HEREUNDER). PURCHASER FURTHER ACKNOWLEDGES AND AGREES THAT THIS AGREEMENT, THE TRANSACTIONS CONTEMPLATED HEREUNDER AND THE VESTING SCHEDULE SET FORTH HEREIN DO NOT CONSTITUTE AN EXPRESS OR IMPLIED PROMISE OF CONTINUED ENGAGEMENT AS A SERVICE PROVIDER FOR THE VESTING PERIOD, FOR ANY PERIOD, OR AT ALL, AND WILL NOT INTERFERE WITH PURCHASER’S RIGHT OR THE COMPANY’S RIGHT TO TERMINATE PURCHASER’S RELATIONSHIP AS A SERVICE PROVIDER AT ANY TIME, WITH OR WITHOUT CAUSE.

13. Notices. Any notice, demand or request required or permitted to be given by either the Company or the Purchaser pursuant to the terms of this Agreement will be in writing and will be deemed given when delivered personally or deposited in the U.S. mail, First Class with postage prepaid, and addressed to the parties at the addresses of the parties set forth at the end of this Agreement or such other address as a party may request by notifying the other in writing.

Any notice to the Escrow Holder will be sent to the Company’s address with a copy to the other party not sending the notice.

14. No Waiver. Either party’s failure to enforce any provision or provisions of this Agreement will not in any way be construed as a waiver of any such provision or provisions, nor prevent that party from thereafter enforcing each and every other provision of this Agreement. The rights granted both parties herein are cumulative and will not constitute a waiver of either party’s right to assert all other legal remedies available to it under the circumstances.

15. Successors and Assigns. The Company may assign any of its rights under this Agreement to single or multiple assignees, and this Agreement will inure to the benefit of the successors and assigns of the Company. Subject to the restrictions on transfer herein set forth, this Agreement will be binding upon Purchaser and his or her heirs, executors, administrators, successors and assigns.

16. Interpretation. Any dispute regarding the interpretation of this Agreement will be submitted by Purchaser or by the Company forthwith to the Administrator which will review such dispute at its next regular meeting. The resolution of such a dispute by the Administrator will be final and binding on all parties.

17. Governing Law; Severability. This Agreement is governed by the internal substantive laws but not the choice of law rules, of California.

18. Entire Agreement. The Plan is incorporated herein by reference. This Agreement (including the exhibits referenced herein), the Plan, and the Investment Representation Statement constitute the entire agreement of the parties with respect to the subject matter hereof and supersede in their entirety all prior undertakings and agreements of the Company and Purchaser with respect to the subject matter hereof, and may not be modified adversely to the Purchaser’s interest except by means of a writing signed by the Company and Purchaser.

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By Purchaser’s signature below, Purchaser represents that he or she is familiar with the terms and provisions of the Plan, and hereby accepts this Agreement subject to all of the terms and provisions thereof. Purchaser has reviewed the Plan and this Agreement in their entirety, has had an opportunity to obtain the advice of counsel prior to executing this Agreement and fully understands all provisions of this Agreement. Purchaser agrees to accept as binding, conclusive and final all decisions or interpretations of the Administrator upon any questions arising under the Plan or this Agreement. Purchaser further agrees to notify the Company upon any change in the residence indicated in the Notice of Grant of Stock Purchase Right.

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EXHIBIT A-1

ASSIGNMENT SEPARATE FROM CERTIFICATE

FOR VALUE RECEIVED I, __________________________, hereby sell, assign and transfer unto Alien Technology Corporation _____________ shares of the Common Stock of Alien Technology Corporation standing in my name of the books of said corporation represented by Certificate No. _____ herewith and do hereby irrevocably constitute and appoint ______________________________ to transfer the said stock on the books of the within named corporation with full power of substitution in the premises.

This Stock Assignment may be used only in accordance with the Restricted Stock Purchase Agreement between Alien Technology Corporation and the undersigned dated ______________, ____ (the “Agreement”).

INSTRUCTIONS: Please do not fill in any blanks other than the signature line. The purpose of this assignment is to enable the Company to exercise its Repurchase Option as set forth in the Agreement, without requiring additional signatures on the part of the Purchaser.

EXHIBIT A-2

JOINT ESCROW INSTRUCTIONS

____________________, ____

Alien Technology Corporation

18220 Butterfield Boulevard

Morgan Hill, CA 95037

Attention: [Corporate Secretary]

Dear [Corporate Secretary]:

As Escrow Agent for both Alien Technology Corporation (the “Company”) and the undersigned purchaser of stock of the Company (the “Purchaser”), you are hereby authorized and directed to hold the documents delivered to you pursuant to the terms of that certain Restricted Stock Purchase Agreement (“Agreement”) between the Company and the undersigned, in accordance with the following instructions:

1. In the event the Company and/or any assignee of the Company (referred to collectively for convenience herein as the “Company”) exercises the Company’s repurchase option set forth in the Agreement (the “Repurchase Option”), the Company will give to Purchaser and you a written notice specifying the number of shares of stock to be purchased, the purchase price, and the time for a closing hereunder at the principal office of the Company. Purchaser and the Company hereby irrevocably authorize and direct you to close the transaction contemplated by such notice in accordance with the terms of said notice.

2. At the closing, you are directed (a) to date the stock assignments necessary for the transfer in question, (b) to fill in the number of shares being transferred, and (c) to deliver same, together with the certificate evidencing the shares of stock to be transferred, to the Company or its assignee, against the simultaneous delivery to you of the purchase price (by cash, a check, or some combination thereof) for the number of shares of stock being purchased pursuant to the exercise of the Company’s Repurchase Option.

3. Purchaser irrevocably authorizes the Company to deposit with you any certificates evidencing shares of stock to be held by you hereunder and any additions and substitutions to said shares as defined in the Agreement. Purchaser does hereby irrevocably constitute and appoint you as Purchaser’s attorney-in-fact and agent for the term of this escrow to execute with respect to such securities all documents necessary or appropriate to make such securities negotiable and to complete any transaction herein contemplated, including but not limited to the filing with any applicable state blue sky authority of any required applications for consent to, or notice of transfer of, the securities. Subject to the provisions of this paragraph 3, Purchaser will exercise all rights and privileges of a shareholder of the Company while the stock is held by you.

4. Upon written request of the Purchaser, but no more than once per calendar year, unless the Company’s Repurchase Option has been exercised, you will deliver to Purchaser a certificate or certificates representing so many shares of stock as are not then subject to the Company’s Repurchase Option. Within ninety (90) days after cessation of Purchaser’s continuous employment by or services to the Company, or any parent or subsidiary of the Company, you will deliver to Purchaser a certificate or certificates representing the aggregate number of shares held or issued pursuant to the Agreement and not purchased by the Company or its assignees pursuant to exercise of the Company’s Repurchase Option.

5. If at the time of termination of this escrow you should have in your possession any documents, securities, or other property belonging to Purchaser, you will deliver all of the same to Purchaser and will be discharged of all further obligations hereunder.

6. Your duties hereunder may be altered, amended, modified or revoked only by a writing signed by all of the parties hereto.

7. You will be obligated only for the performance of such duties as are specifically set forth herein and may rely and will be protected in relying or refraining from acting on any instrument reasonably believed by you to be genuine and to have been signed or presented by the proper party or parties. You will not be personally liable for any act you may do or omit to do hereunder as Escrow Agent or as attorney-in-fact for Purchaser while acting in good faith, and any act done or omitted by you pursuant to the advice of your own attorneys will be conclusive evidence of such good faith.

8. You are hereby expressly authorized to disregard any and all warnings given by any of the parties hereto or by any other person or corporation, excepting only orders or process of courts of law and are hereby expressly authorized to comply with and obey orders, judgments or decrees of any court. In case you obey or comply with any such order, judgment or decree, you will not be liable to any of the parties hereto or to any other person, firm or corporation by reason of such compliance, notwithstanding any such order, judgment or decree being subsequently reversed, modified, annulled, set aside, vacated or found to have been entered without jurisdiction.

9. You will not be liable in any respect on account of the identity, authorities or rights of the parties executing or delivering or purporting to execute or deliver the Agreement or any documents or papers deposited or called for hereunder.

10. You will not be liable for the outlawing of any rights under the Statute of Limitations with respect to these Joint Escrow Instructions or any documents deposited with you.

11. You will be entitled to employ such legal counsel and other experts as you may deem necessary properly to advise you in connection with your obligations hereunder, may rely upon the advice of such counsel, and may pay such counsel reasonable compensation therefor.

12. Your responsibilities as Escrow Agent hereunder will terminate if you will cease to be an officer or agent of the Company or if you will resign by written notice to each party. In the event of any such termination, the Company will appoint a successor Escrow Agent.

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13. If you reasonably require other or further instruments in connection with these Joint Escrow Instructions or obligations in respect hereto, the necessary parties hereto will join in furnishing such instruments.

14. It is understood and agreed that should any dispute arise with respect to the delivery and/or ownership or right of possession of the securities held by you hereunder, you are authorized and directed to retain in your possession without liability to anyone all or any part of said securities until such disputes will have been settled either by mutual written agreement of the parties concerned or by a final order, decree or judgment of a court of competent jurisdiction after the time for appeal has expired and no appeal has been perfected, but you will be under no duty whatsoever to institute or defend any such proceedings.

15. Any notice required or permitted hereunder will be given in writing and will be deemed effectively given upon personal delivery or upon deposit in the United States Post Office, by registered or certified mail with postage and fees prepaid, addressed to each of the other parties thereunto entitled at the following addresses or at such other addresses as a party may designate by ten (10) days advance written notice to each of the other parties hereto.

16. By signing these Joint Escrow Instructions, you become a party hereto only for the purpose of said Joint Escrow Instructions; you do not become a party to the Agreement.

17. This instrument will be binding upon and inure to the benefit of the parties hereto, and their respective successors and permitted assigns.

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18. The Restricted Stock Purchase Agreement is incorporated herein by reference. These Joint Escrow Instructions, the 2006 Equity Incentive Plan, and the Restricted Stock Purchase Agreement (including the exhibits referenced therein) constitute the entire agreement of the parties with respect to the subject matter hereof and supersede in their entirety all prior undertakings and agreements of the Escrow Agent, the Purchaser and the Company with respect to the subject matter hereof, and may not be modified except by means of a writing signed by the Escrow Agent, the Purchaser and the Company.

19. These Joint Escrow Instructions will be governed by, and construed and enforced in accordance with, the laws of the State of California.

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EXHIBIT A-3

ELECTION UNDER SECTION 83(b)

OF THE INTERNAL REVENUE CODE OF 1986

The undersigned taxpayer hereby elects, pursuant to the above-referenced Federal Tax Code, to include in taxpayer’s gross income for the current taxable year, the amount of any compensation taxable to taxpayer in connection with his receipt of the property described below:

The Shares may be repurchased by the Company, or its assignee, on certain events. This right lapses with regard to a portion of the Shares based on the continued performance of services by the taxpayer over time.

$_______________

$_______________

The undersigned has submitted a copy of this statement to the person for whom the services were performed in connection with the undersigned’s receipt of the above-described property. The transferee of such property is the person performing the services in connection with the transfer of said property.

The undersigned understands that the foregoing election may not be revoked except with the consent of the Commissioner.

EXHIBIT B

INVESTMENT REPRESENTATION STATEMENT

In connection with the purchase of the above-listed Securities, the undersigned Purchaser represents to the Company the following:

(a) Purchaser is aware of the Company’s business affairs and financial condition and has acquired sufficient information about the Company to reach an informed and knowledgeable decision to acquire the Securities. Purchaser is acquiring these Securities for investment for Purchaser’s own account only and not with a view to, or for resale in connection with, any “distribution” thereof within the meaning of the Securities Act of 1933, as amended (the “Securities Act”).

(b) Purchaser acknowledges and understands that the Securities constitute “restricted securities” under the Securities Act and have not been registered under the Securities Act in reliance upon a specific exemption therefrom, which exemption depends upon, among other things, the bona fide nature of Purchaser’s investment intent as expressed herein. In this connection, Purchaser understands that, in the view of the Securities and Exchange Commission, the statutory basis for such exemption may be unavailable if Purchaser’s representation was predicated solely upon a present intention to hold these Securities for the minimum capital gains period specified under tax statutes, for a deferred sale, for or until an increase or decrease in the market price of the Securities, or for a period of one (1) year or any other fixed period in the future. Purchaser further understands that the Securities must be held indefinitely unless they are subsequently registered under the Securities Act or an exemption from such registration is available. Purchaser further acknowledges and understands that the Company is under no obligation to register the Securities. Purchaser understands that the certificate evidencing the Securities will be imprinted with a legend which prohibits the transfer of the Securities unless they are registered or such registration is not required in the opinion of counsel satisfactory to the Company, a legend prohibiting their transfer without the consent of the Commissioner of Corporations of the State of California and any other legend required under applicable state securities laws.

(c) Purchaser is familiar with the provisions of Rule 701 and Rule 144, each promulgated under the Securities Act, which, in substance, permit limited public resale of “restricted securities” acquired, directly or indirectly from the issuer thereof, in a non-public offering subject to the satisfaction of certain conditions. Rule 701 provides that if the issuer qualifies under Rule 701 at

the time of the grant of the Stock Purchase Right to the Purchaser, the exercise will be exempt from registration under the Securities Act. In the event the Company becomes subject to the reporting requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, ninety (90) days thereafter (or such longer period as any market stand-off agreement may require) the Securities exempt under Rule 701 may be resold, subject to the satisfaction of certain of the conditions specified by Rule 144, including: (1) the resale being made through a broker in an unsolicited “broker’s transaction” or in transactions directly with a market maker (as said term is defined under the Securities Exchange Act of 1934); and, in the case of an affiliate, (2) the availability of certain public information about the Company, (3) the amount of Securities being sold during any three (3) month period not exceeding the limitations specified in Rule 144(e), and (4) the timely filing of a Form 144, if applicable.

In the event that the Company does not qualify under Rule 701 at the time of grant of the Stock Purchase Right, then the Securities may be resold in certain limited circumstances subject to the provisions of Rule 144, which requires the resale to occur not less than one (1) year after the later of the date the Securities were sold by the Company or the date the Securities were sold by an affiliate of the Company, within the meaning of Rule 144; and, in the case of acquisition of the Securities by an affiliate, or by a non-affiliate who subsequently holds the Securities less than two (2) years, the satisfaction of the conditions set forth in sections (1), (2), (3) and (4) of the paragraph immediately above.

(d) Purchaser further understands that in the event all of the applicable requirements of Rule 701 or 144 are not satisfied, registration under the Securities Act, compliance with Regulation A, or some other registration exemption will be required; and that, notwithstanding the fact that Rules 144 and 701 are not exclusive, the Staff of the Securities and Exchange Commission has expressed its opinion that persons proposing to sell private placement securities other than in a registered offering and otherwise than pursuant to Rules 144 or 701 will have a substantial burden of proof in establishing that an exemption from registration is available for such offers or sales, and that such persons and their respective brokers who participate in such transactions do so at their own risk. Purchaser understands that no assurances can be given that any such other registration exemption will be available in such event.

Signature of Purchaser:

Date:________________, ____

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