We've followed the analog hole superhero, Hauppauge HD-PVR for the past year since it was first announced at CES. During that time, the likes of SageTV, BeyondTV, GBPVR, MythTV and MediaPortal all were able to support the HD-PVR. SageTV won the mult-platform support award first with Windows, then Linux and finally Mac support. For those Mac users SageTV was the only way to use the HD-PVR, but now you can use it with the Elagato Eye TV for the Mac.
Actually a beta for EyeTV was released on November 13th and many beta testers have been hard at work since then. It's still in beta, but you can go sign up and try it out if you have a desire to match up your EyeTV HTPC with the Hauppauge HD-PVR. I think we'll see support for one more HTPC software platform in the next few weeks - keep your eye on GeekTonic for that.
Read more about the Hauppauge HD-PVR Beta at the EyeTV Lounge (forum registration required)
If you're interested in using the Hauppauge HD-PVR to get liveTV and recorded TV in all of its digital and HD glory, here are your options:
SageTV XP, Vista, WHS, Linux, Mac and HD200 extenders
BeyondTV with XP and VistaGBPVR with XP and Vista and PopCorn Hour
Media Portal RC3 with XP and Vista (download & further info)