I have the Hauppauge WinTV-PVR-500 dual tuner, and it's worked fine with WinXP MCE 2005 and DirecTV. However, Verizon is making available FIOS-TV (I already have FIOS internet service), and I'm switching.
So, I did some checking and found that you need Vista to work with FIOS TV. Okay, no problem, I've been meaning to upgrade my XP MCE box to Vista for a while now.
Sure, I had to do BIOS upgrades, firmware upgrades, and get new drivers for my video and sound cards. No biggie, used to that. Ran the tool to check compatibility, no real issues. Got rid of software that would not work, got upgrades for others.
Finally did the upgrade... and while the tuners on the PVR-500 work right, as reported by Device Manager, the Media Center application doesn't think I have tuners installed and won't let me set up TV!
I checked all over the place, on support forums, blogs, newsgroups, technet.microsoft.com, mskb, ... and no real answers. It looks like a number of tuner products are giving people headaches, not just the Hauppauge. A few responses from kind MVP's and others, but nothing from Microsoft.
So Verizon is coming to install tomorrow, and I'm still dead in the water. I won't be able to record a thing until this is fixed. :(
So be wary, and aware that you might get hosed. If I ever get it working, I'll be sure to post here and give kudo's to whomever comes through. It would be nice if it was a Microsoft response that fixed it, though...