EXHIBIT 24.1

                                POWER OF ATTORNEY


The undersigned hereby appoints David C. Lee and Lawrence D. Cutler, or either
of them, his true and lawful attorney-in-fact and agent to execute and file with
the Securities and Exchange Commission any Schedule 13D, Schedule 13G, Form 3,
Form 4, Form 5, any amendments thereto and any related documentation which may
be required to be filed in his individual capacity as a result of the
undersigned's beneficial ownership of, or participation in a group with respect
to, securities directly or indirectly beneficially owned by D.B. Zwirn & Co.,
L.P. or any of its affiliates, and granting unto said attorney-in-fact and agent
full power and authority to do and perform each and every act and thing which he
might or could do in person, hereby ratifying and confirming all that said
attorney-in-fact and agent may lawfully do or cause to be done by virtue hereof.
The authority of David C. Lee and Lawrence D. Cutler, or either of them, under
this Power of Attorney shall continue with respect to the undersigned until the
undersigned is no longer required to file Schedule l3Ds, Schedule l3Gs, Forms 3,
Forms 4, or Forms 5 unless revoked earlier in writing.

Date:                                         November 7, 2007

                                              /s/ Daniel B. Zwirn
                                              ---------------------------
                                              Daniel B. Zwirn