GENERAL RELEASE

Exhibit 10.21

January 19, 2007

(Revision to Agreement dated January 15, 2007)

Bryan R. Carr

[Address]

Dear Mr. Carr:

This Letter Agreement incorporating the annexed General Release (collectively sometimes referred to as the “Agreement”) contains the terms and conditions applicable to your separation from employment with Intellon Corporation (“Intellon” or “Company”).

1. Termination of Employment. Effective as of January 15, 2007, you will resign, by mutual agreement, your position as Senior Vice President, Treasurer, Chief Financial Officer and Assistant Secretary of Intellon. Effective as of such date, you also will resign your position as an authorized signer of the Intellon Corporation 401(k) Plan. Through February 14, 2007, you will continue to provide services to Intellon as a non-officer employee and cooperate with Intellon’s efforts to transfer your duties and responsibilities to others in an orderly transition. Your last day of employment will be February 14, 2007 (“Termination Date”)

2. Compensation and Benefits. In full satisfaction of Intellon’s obligations to you under your employment agreement, dated April 22, 1999, (“Employment Agreement”) and in consideration for the covenants and agreements set forth herein:

Bryan R. Carr

January 19, 2007

Page 2

Bryan R. Carr

January 19, 2007

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3. No Other Payments or Benefits Due. Except as specifically provided in this Agreement, you are not entitled to any other payments for salary, benefits, bonuses, allowances, severance pay, sick pay, vacation or holidays, or to any other form or kind of payment or benefits.

4. References. Intellon, in accordance with its policy on references, will provide prospective employers, upon written request, with its usual verification of employment data. It will confirm dates of employment and the position you held with the Company and will upon request confirm that you resigned your position with the Company.

5. General Release. You agree to execute and be bound by the terms of the General Release annexed to and made a part of this Agreement. You understand the benefits provided in this Agreement are made in consideration of the waiver and release of claims as provided in the General Release and that no such benefits will be provided should the Agreement or General Release be revoked as provided below.

6. Protection of Inventions and Copyrights.

7. Non-Disclosure of Confidential Information. You acknowledge that you have been provided with information about Intellon, and in your employment by Intellon have been in close contact with many confidential affairs of Intellon and its subsidiary, including information about costs, profits, markets, sales, products, key personnel, customers, projects, pricing policies, operational methods, technical processes and other business affairs and methods, plans for future developments and other information not readily available to the public. In recognition of the foregoing, you agree:

Bryan R. Carr

January 19, 2007

Page 4

8. Non-Competition/No Solicitation/No Interference. While you continue in Intellon’s employ and for a period of twelve (12) months after your Termination Date:

9. Non-Disparagement. You hereby agree that you will not, directly or indirectly, now or at any time in the future, whether in writing, orally or electronically, make any negative statements or comments or do anything that (i) derogates the Company or any of its current or former directors, officers, employees, or shareholders or (ii) could reasonably be expected to be detrimental to the business or financial prospects or reputation of the Company.

10. Non-Removal/Return of Company Property. You agree not to remove any documents, equipment or property belonging to Intellon, or any of its affiliates, subsidiaries or predecessor corporations and their employees, customers or others doing business with them. You further agree to return, on or before February 14, 2007, all equipment and property belonging to Intellon, and/or the other said corporations, which is now in your possession or control, including copies of any and all documents containing information of a proprietary or confidential nature. You will also return, on or before February 14, 2007, all credit cards representing corporate charge accounts, as well as any keys, passes, identification cards, or badges.

Bryan R. Carr

January 19, 2007

Page 5

11. Non-Disclosure of Agreement. You understand and agree that the terms of this Agreement are confidential and, unless required by law or for the purposes of enforcing the Agreement or when needed to consult with your attorneys, financial or tax advisors or spouse, you will not disclose any such terms to any other person. You also agree that you will instruct your attorneys, financial and tax advisors, accountants and spouse not to disclose such terms to any other person.

12. Breach. In the event of a breach by you of any of the representations, covenants and obligations under this Agreement, the Company may cease making any further payments to you or on your behalf and continuing benefits under this Agreement. Further, in the event of such a breach, you will be obligated to reimburse the Company for all payments made to you or on your behalf and for the cost of continuing all such benefits under this Agreement.

13. Specific Remedies. If you commit a breach of any of the provisions of Sections 6, 7 or 8 hereof, Intellon will have (a) the right to have such provisions specifically enforced by any court having equity jurisdiction, it being acknowledged and agreed that any such breach will cause irreparable injury to Intellon and that money damages will not provide an adequate remedy to Intellon, and (b) the right to require you to account for and pay over to Intellon all compensation, profits, monies, accruals, increments and other benefits (collectively “Benefits”) derived or received by you as a result of any transaction constituting a breach of any of the provisions of Sections 6, 7 or 8, and you hereby agree to account for and pay over such Benefits to Intellon.

14. Independence, Severability and Non-Exclusivity. Each of the rights enumerated in Sections 6, 7 or 8 hereof and the remedies enumerated in Section 13 hereof will be independent of the others and will be in addition to and not in lieu of any other rights and remedies available to Intellon at law or in equity. If any of the covenants contained in Sections 6, 7 or 8, or any part of any of them, is hereinafter construed or adjudicated to be invalid or unenforceable, the same will not affect the remainder of the covenant or covenants or rights or remedies which will be given full effect without regard to the invalid portions. The parties intend to and do hereby confer jurisdiction to enforce the covenants contained in Sections 6, 7 or 8 and the remedies enumerated in Section 13 upon the courts of any state of the United States, and any other government jurisdiction within the geographical scope of such covenants. If any of the covenants contained in Sections 6, 7, or 8 is held to be invalid or unenforceable because of the duration of such provision or the area covered thereby, the parties agree that the court making such determination will have the power to reduce the duration and/or area of such provision and in its reduced form said provision will then be enforceable. No such holding of invalidity or unenforceability in one jurisdiction will be or in any way affect Intellon’s right to the relief provided in Section 13 or otherwise in the courts of any other state or jurisdiction within the geographical scope of such covenants as to breaches of such covenants in such other respective states or jurisdictions, such covenants being, for this purpose, severable into diverse and independent covenants.

15. Expense Claims. You will submit any and all outstanding business expense claims in the normal manner for approval no later than February 14, 2007. The Company will reimburse you for such amounts in accordance with and subject to the terms and conditions of the Company’s expense reimbursement policies applicable to other employees. Expense claims submitted after that date will not be honored and any debit balances that may exist will be payable by you personally.

16. Cooperation. You understand that the Company may be a party to, claims by or against the Company, as well as litigation or administrative proceedings in which you may be called to

Bryan R. Carr

January 19, 2007

Page 6

testify as a witness, concerning matters about which you may have obtained knowledge during the course of your employment with the Company. You agree to cooperate fully with the Company’s counsel handling such claims and to make yourself reasonably available to the Company’s counsel to review your testimony in advance of a deposition, discovery or trial and in making yourself available to testify as may be required. Other than travel and related expenses and applicable, statutorily-mandated witness fees, you agree that you will not be paid by the Company in connection with your testimony or participation in such litigation or other proceedings.

17. Representations and Acknowledgments.

18. Non-Admissions. This Agreement is not intended, and should not be construed, as evidence of any wrongdoing on the part of Intellon or of any parent, affiliate, subsidiary, predecessor or successor corporations or as any admission of liability under any federal, state or local law or regulation of any nature whatsoever.

19. Jurisdiction. You hereby (a) irrevocably submit to the sole and exclusive venue and jurisdiction of a state or federal court in Marion or Orange County, Florida, for the purposes of any suit, action or other proceeding arising out of this Agreement and (b) waive, and agree not to assert, by way of motion, as a defense or otherwise, in any such suit, action or proceeding, to the extent permitted by applicable law, that the suit, action or proceeding is brought in an inconvenient forum, that the venue of the suit, action or proceeding is improper or that this Agreement may not be enforced in or by such courts. You also agree to be subject to the personal jurisdiction of such court through service by certified mail, postage prepaid, at your address: 4711 SW 97^th Terrace, Gainesville, FL 32608.

20. Applicable Law. The interpretation and application of the terms of this Agreement will be governed and construed in accordance with the laws of the State of Florida excluding (to the greatest extent a Florida court would permit) any rule of law that would cause application of the laws of any jurisdiction other than the State of Florida.

21. Descriptive Headings. The section headings contained in this Agreement are for reference purposes only and will not in any way affect the meaning or interpretation of this Agreement.

22. Who is Bound. You agree this Agreement is binding upon and will inure to the benefit of the parties and to each of their heirs, executors, administrators, trustees, representatives, successors or assigns. The promises you have made to Intellon, you agree, are also made for the benefit of its affiliates, subsidiaries, parent and all other related existing, succeeding or predecessor corporations.

Bryan R. Carr

January 19, 2007

Page 7

You may signify your acceptance of the terms and conditions of this Agreement, including the incorporated General Release, by signing before a notary public both the enclosed copy of the Agreement and the General Release itself and returning them to me.

Thank you for your service to Intellon. We wish you well in your future endeavors.

On January 19, 2007, before me personally came Bryan R. Carr, to me known and known to me to be the individual described in, and who executed, the forgoing Letter Agreement and who duly acknowledged to me that he executed the same.

GENERAL RELEASE

As consideration for the severance pay, ACIP bonus, acceleration of vesting of your unvested restricted common stock and other promises and benefits to which Bryan R. Carr, the RELEASOR, would not otherwise be entitled, which are set forth in the Letter Agreement between RELEASOR and Intellon, dated January 19, 2007, the RELEASOR, with the intention of binding himself, his heirs, personal representatives, executors, administrators and assigns, hereby releases and forever discharges Intellon, their affiliates, subsidiaries, parent and predecessors corporations and their employees, officers, directors, agents, attorneys, representatives and trustees or administrators under any employee benefit plans (collectively referred to as the RELEASEES), from any and all claims, demands, damages, remedies, contracts (express or implied) and causes of action of any kind or nature whatsoever, whether known or unknown, which RELEASOR had, now has or in the future may or could have, against RELEASEES arising out of or relating to any matter up to the date of the execution of this General Release, including, but not limited to, any and all claims in connection with his employment with Intellon, and the termination thereof, excluding any claims to enforce his rights under the Letter Agreement.

Without limiting the generality of the foregoing, RELEASOR agrees that he knowingly and voluntarily waives all rights he has or may have (or that of anyone on his behalf) to commence or prosecute any legal proceeding or action under the Age Discrimination in Employment Act of 1967, as amended, the Older Worker Benefits Protection Act of 1990, Title VII of the Civil Rights Act of 1964, the Americans With Disabilities Act, the Family and Medical Leave Act, the Employee Retirement Income Security Act of 1974, as amended, under any and all other federal, state and local equal employment, fair employment and civil or human rights laws (whether statutory, regulatory or decisional), under the statutory, regulatory or common law of any jurisdiction, including, but not limited to, any and all tort claims (e.g., defamation, intentional infliction of emotional distress, wrongful termination, negligent hiring or retention, conversion, interference with contract, abusive discharge), and under any and all federal, state or local laws relating to benefits, labor or employment standards or retaliation (e.g., whistleblowing).

If prior to the date of execution of this General Release, RELEASOR filed charge(s), complaint(s) or action(s) against any of the RELEASEES related to any matter released or waived herein, he agrees to withdraw or discontinue them and execute all documents necessary to effectuate their withdrawal or discontinuance.

Should any proceeding be instituted by or on behalf of RELEASOR with respect to matters here settled, released or waived, then the Letter Agreement and this General Release shall be deemed full satisfaction of any such claim(s) and sufficient basis for their immediate dismissal.

RELEASOR ACKNOWLEDGES HE FULLY UNDERSTANDS THE CONTENTS OF THE LETTER AGREEMENT AND GENERAL RELEASE AND EXECUTES THEM FREELY AND VOLUNTARILY, WITHOUT DURESS, COERCION OR UNDUE INFLUENCE. THIS RELEASE AND THE LETTER AGREEMENT MAY BE REVOKED WITHIN SEVEN (7) DAYS FOLLOWING THEIR EXECUTION AND THEY SHALL NOT BECOME EFFECTIVE OR ENFORCEABLE UNTIL THE SEVEN (7) DAY REVOCATION PERIOD HAS EXPIRED.

IN WITNESS WHEREOF, RELEASOR has signed this General Release this 19^th day of January 2007.

On January 19, 2007, before me personally came Bryan R. Carr, to me known and known to me to be the individual described in, and who executed, the foregoing GENERAL RELEASE and who duly acknowledged to me that he executed the same.