I was thinking that this board, with a 6600GT video card, and a Hauppage card would be good. I wonder if it has Azalia, or will require additional a sound card (maybe a separate Soundstorm soundcard if NVidia gets around to competing with Creative Labs). With a passively cooled PSU, and passive cooling for the video card, a fanless HTPC with the horsepower to play the newest games could be created.
Just food for thought.