That was something I managed to figure out during some Internet searching. I don't actually have HDTV, I've got analog cable with one of those digital boxes.
My first 58 channels are actually analog and the rest are digital. I'm hoping to get a card capable of analog and digital support. Though I'm not worried about HDTV yet. I'll probably try out the analog part of a card, see how much I use it and then decide if I want to get an extra digital box.
Do you have any suggestions of what kind of TV tuner card would work well for doing this, and play nice with Media Center 12 for analog channels?