Power of Attorney

KNOW ALL MEN BY THESE PRESENTS, that the person whose signature
appears below hereby revokes all powers of attorney relating to
the following matters and constitutes and appoints Don M. Hardison
and Jeffrey R. Luber and any one of them acting singly, the true
and lawful attorneys-in-fact and agents, with full power of
substitution and resubstitution, for the undersigned and in the
undersigned's name, place and stead, in any and all capacities
(until revoked in writing) to sign any and all instruments,
certificates and documents required to be executed on behalf of
the undersigned as an individual or on behalf of the undersigneds
holding company, as the case may be, pursuant to sections 13 and
16 of the Securities Exchange Act of 1934, as amended
(the "Exchange Act"), and any and all regulations promulgated
thereunder, and to file the same, with all exhibits thereto, and
any other documents in connection therewith, with the Securities
and Exchange Commission, and with any other entity when and if
such is mandated by the Exchange Act or the By-laws of the
National Association of Securities Dealers, granting unto said
attorneys-in-fact and agents full power and authority to do and
perform each and every act and thing requisite and necessary
fully to all intents and purposes as the undersigned might or
could do in person thereby ratifying and confirming all that
said attorneys-in-fact and agents, or their substitute or
substitutes, may lawfully do or cause to be done by virtue hereof.

IN WITNESS WHEREOF, this Power of Attorney has been signed September
28, 2004.



			Signature:  /s/ Harry W. Wilcox, III

			Name:        Harry W. Wilcox, III