So as of this very moment, only the ASUS Xonar HD soundcard with the TMT software can bitstream TrueHD & DTS-HD.
The Azun HD soundcard + PowerDVD9 software will bitstream TrueHD & DTS-HD.
Like Glocks says, the theoretical potential of the hardware without the software is useless.
It's kind of like saying that I'm a millionaire, but I just don't have the money yet.