I've been waiting to find the holy grail of mobos that will be the perfect media director. I have yet to find one like many of you here.
After scouring the net I came across the ZvBox and watched the promo vids. It basically takes the VGA out (and 5.1 via USB) from your comp and converts it into a HD ATSC (1080i) signal and pushes it through your existing coax cable in your home. The technology is called "localcasting" and I think it looks very promising, especially if it works with LinuxMCE and MythTV.
Thoughts? The only negative I can come up with is that you can't watch 2 different things since it's only one direct stream...