Very interesting topic. Also a big feature for the ClearOS Home Server edition.
I have to try this sometime. I have a old Hauppauge Win PVR-TV-500 (DVB-C). This is for analog television. So i can test this. I now have a UPC Set top box (digital television), but i'm not happy with it. So maybe i can use mythtv on ClearOS, and build later a htpc or buy a mac mini.
Only there are a few problems The first problem i want to watch digital television. The only way to go (Netherlands, when the provider is UPC) is buy a satellite dish (DVB-S). Where i'm living we have UPC as cabel provider. UPC and a htpc is a no go (digital signal is encrypted and the smart card is only usable on the UPC set top-box). Second problem i think my neighbors are not very happy when i'm installing a satellite dish...
Maybe there is a other solution using DVB-T, Digitenne. Only i heard the signal is terrible... It is a MPEG-2 stream (2-3Mbit).
I have only experience with a htpc with a analog card. What are your experiences with digital television? Do you have DVB-S or DVB-T. Any dutch users with experience?