wish I had the HD-tv. I've been running my TV as an optional monitor for a couple years now. just ran the video-out line from the computer to one of the (video 2, I think) input slots on the home theater receiver.
with standard TV resolution it's not great for gaming. but it is kinda for kicking around the net with the cordless keyboard and mouse.
looking back, I guess I ran all that cable, and screwed around hooking it up so I could downgrade myself from PC to 'net-TV'.
oh well.