Hey Philly, I have an internet TV proggie called DTV4PC, and let's just say that I'm glad it came free with another purchase. Had I actually paid for it I would be very disappointed because there's very little content on there I would want to watch, and what there is that might interest me comes on at some awful hour when I'd rather be asleep. However, that's not the worst of it! Quite a few of the channels that look like they might be worth watching are in fact subscriber channels... meaning it's more bucks up front if you want to watch something half decent.
The other thing is that you need pretty decent internet speeds, otherwise the picture and sound frequently break up and you miss more than you get to see/hear. So yeah, high speed internet is imperative if you want to enjoy it.
I suggest you try out a freebie for connection issues, etc, before you part with any cash. Here's one you can try and it won't cost you a cent, just 4mb of download quota.