I recently emailed AJA Video Tech Support about this and on August 7, 2006 (just a couple hours after I emailed them if you’re interrested) here’s the response I got:
“My understanding is 64 Bit support will come when Vista is released. The
lack of 64 Bit support for many of the applications we rely on has been the
main reason we don’t work well or at all in the 64 Bit environment.”
I am looking forward to being able to update to a 64bit OS. The Xena is my last piece of hardware without WinXP x64 or Vista support.