I have one of these for my mac:
http://www.elgato.com/elgato/int/mai...oducts.en.html
Having had many TV cards before, trust me this one is great. Never skips, crashes, no audio-synch problems and it has good software. Many cards are utter ****e.
I just open the program guide, click on the programs I want to record and leave it to it. Once done I click on one button and it compresses them and puts the on my Ipod through I tunes. Easy