EX-24

               LIMITED POWER OF ATTORNEY
                         FOR
                 OPTIUM CORPORATION
                SECTION 16(a) FILINGS

Know all by these presents, that the undersigned
hereby constitutes and appoints each of David Renner
and Christopher Brown, signing singly, the
undersigned's true and lawful attorney-in-fact to:

	(1)	Execute for and on behalf of the
undersigned, in the undersigned's capacity as an
officer, director and/or stockholder of Optium
Corporation (the "Company"), Forms 3, 4, and 5 and
amendments thereto in accordance with Section 16(a) of
the Securities Exchange Act of 1934 and the rules
thereunder;

	(2)	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 amendment thereto and timely file such form
with the United States Securities and Exchange
Commission (the "SEC") and any stock exchange or
similar authority; and

	(3)	Take any other action of any type whatsoever
which, in the opinion of such attorney-in-fact, may be
necessary or desirable in connection with the
foregoing authority, 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.

	The undersigned hereby grants to each such
attorney-in-fact full power and authority to do and
perform any and every act and thing whatsoever
required, 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 attorneys-in-fact, in
serving in such capacity at the request of the
undersigned, are not assuming, nor is the Company
assuming, any of the undersigned's responsibilities to
comply with Section 16 of the Securities Exchange Act
of 1934.

	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 with respect to the
undersigned's holdings of and transaction in
securities of the Company, unless earlier revoked by
the undersigned in a signed writing delivered to the
foregoing attorneys-in-fact.  This Power of Attorney
may be filed with the SEC as a confirming statement of
the authority granted herein.


	IN WITNESS WHEREOF, the undersigned has caused
this Power of Attorney to be executed as of this 20th
day of October, 2006.

/s/ Christopher Schiavo, attorney-in-fact
Name:
Battery Ventures VI, L.P.
Battery Partners VI, LLC
Battery Investment Partners VI, LLC
Thomas J. Crotty
Oliver D. Curme
Richard D. Frisbie
Kenneth P. Lawler
Mark H. Sherman
Scott R. Tobin

EX-24

               LIMITED POWER OF ATTORNEY
                         FOR
                 OPTIUM CORPORATION
                SECTION 16(a) FILINGS

Know all by these presents, that the undersigned
hereby constitutes and appoints each of David Renner
and Christopher Brown, signing singly, the
undersigned's true and lawful attorney-in-fact to:

	(1)	Execute for and on behalf of the
undersigned, in the undersigned's capacity as an
officer, director and/or stockholder of Optium
Corporation (the "Company"), Forms 3, 4, and 5 and
amendments thereto in accordance with Section 16(a) of
the Securities Exchange Act of 1934 and the rules
thereunder;

	(2)	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 amendment thereto and timely file such form
with the United States Securities and Exchange
Commission (the "SEC") and any stock exchange or
similar authority; and

	(3)	Take any other action of any type whatsoever
which, in the opinion of such attorney-in-fact, may be
necessary or desirable in connection with the
foregoing authority, 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.

	The undersigned hereby grants to each such
attorney-in-fact full power and authority to do and
perform any and every act and thing whatsoever
required, 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 attorneys-in-fact, in
serving in such capacity at the request of the
undersigned, are not assuming, nor is the Company
assuming, any of the undersigned's responsibilities to
comply with Section 16 of the Securities Exchange Act
of 1934.

	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 with respect to the
undersigned's holdings of and transaction in
securities of the Company, unless earlier revoked by
the undersigned in a signed writing delivered to the
foregoing attorneys-in-fact.  This Power of Attorney
may be filed with the SEC as a confirming statement of
the authority granted herein.


	IN WITNESS WHEREOF, the undersigned has caused
this Power of Attorney to be executed as of this 20th
day of October, 2006.




/s/ Morgan M. Jones
Name: Morgan M. Jones