I think you'll be surprised when you go to the TV shows area of iTunes -- lots of networks have jumped on the bandwagon. I have both seasons of Lost and both seasons of Numb3rs from iTunes, and I love watching them that way. After a year and a half of watching TV on DVDs, I find that having to wait a week between episodes and deal with commercials very distracting. (Also, with Lost, it's easier to keep up with all the mysteries. Otherwise I'd have to take notes!)