I see that ATI has an HDTV-ready card (and I'm sure there will be more HD-capable cards in the near future)...but since most of us get our HDTV via the cable company and don't really want to spend that extra $12-$15/month on an additional cable box rental just for the computer, I want to know if a CableCard adapter for a computer exists. The rental for an individual CableCard is only like $1.50/month. Any suggestions?