This is just FYI - Pinnacle PCTV HD PCI seems to be working with MC12.
Picked up same amount of channels as the native Pinnacle software - except for QAM channels of course as QAM is not supported by MC.
Didn't do any extensive testing, just checked the reception.
Still not convinced why I might need TV in my HTPC - stand alone HDTV-PVR is enough for me..). It's going back to Fry's..