POWER OF ATTORNEY

Know all by these presents that the undersigned hereby constitutes and appoints R. Allen Lyles, with full power of substitution, the undersigned's true and lawful attorney-in-fact to:

(1)	prepare, execute in the undersigned's name and on the undersigned's behalf, and submit to the U.S. Securities and Exchange Commission (the "SEC") any necessary or appropriate amendments to the undersigned's Form ID and any other documents necessary or appropriate to obtain codes and passwords enabling the undersigned to make electronic filings with the SEC of reports required by Section 13 or Section 16(a) of the Securities Exchange Act of 1934 and the rules thereunder (the "Act") or any other rule or regulation of the SEC;
(2)	execute for and on behalf of the undersigned, in any appropriate capacity, Forms 3, 4, and 5 and all amendments thereto, in accordance with Section 16(a) of the Act, and all filings on Schedule 13D or Schedule 13G, and all amendments thereto, in accordance with Section 13 of the Act;
(3)	do and perform any and all acts for and on behalf of the undersigned which may be necessary or desirable to complete and execute any such Form 3, 4, or 5, or Schedule 13D or Schedule 13G, complete and execute any amendment or amendments thereto, and timely file such form or schedule with the SEC and any stock exchange or similar authority; and
(4)	take any other action of any type whatsoever in connection with the foregoing which, in the opinion of such attorney-in-fact, may be of benefit to, in the best interest of, or legally required by, the undersigned, it being understood that the documents executed by such attorney-in-fact on behalf of the undersigned pursuant to this Power of Attorney shall be in such form and shall contain such terms and conditions as such attorney-in-fact may approve in such attorney-in-fact's discretion.

The undersigned hereby grants to such attorney-in-fact full power and authority to do and perform any and every act and thing whatsoever requisite, necessary, or proper to be done in the exercise of any of the rights and powers herein granted, as fully to all intents and purposes as the undersigned might or could do if personally present, with full power of substitution or revocation, hereby ratifying and confirming all that such attorney-in-fact, or such attorney-in-fact's substitute or substitutes, shall lawfully do or cause to be done by virtue of this power of attorney and the rights and powers herein granted. The undersigned acknowledges that the foregoing attorney-in-fact, in serving in such capacity at the request of the undersigned, are not assuming, nor is any applicable issuer assuming, any of the undersigned's responsibilities to comply with Sections 13 or 16 of the Act.

This Power of Attorney shall remain in full force and effect until the undersigned is no longer required to file Forms 3, 4, and 5 or Schedule 13D or Schedule 13G with respect to the undersigned's holdings of and transactions in securities, unless earlier revoked by the undersigned in a signed writing delivered to the foregoing attorneys-in-fact.

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be executed as of this 7th day of September, 2007.

/s/ Douglas T. Breeden

Douglas T. Breeden