If you want to have TV on your Touch, I would recommend you take a look at the Slingbox approach (
www.slingmedia.com). It's not a good fit for everyone, but if you have a home setup that can accomodate it, then it's a really great solution.
For me I have no additional monthly fees and I now have full access to my Tivo for recorded programs and all the DirecTV channels I have at home.
If you go full screen, you need to have a good fast steady connection, but staying in portrait mode I can watch TV for a full hour while riding the commuter train from the far suburbs to downtown Chicago and only drop maybe once and stutter-and-recover a couple other times.