I just got WebTV thinking it'd be great for doing stuff like that but it doesn't even let you play MP3 files, let alone streaming video. I think web lessons are the way of the future but it's gonna have to get more accessible to the majority of people who don't have computers. I'm hoping in 5 years or so you'll be able to take live lessons through your TV using 2 way web cams. I'm also hoping that independant artists and garage bands will be able to broadcast there own live shows right from home to millions of tv sets. It'd be so cool to just fire up your own one man band midi set up and play a few sets every night to a huge audience. (hopefully there'll be a way to make money from it too :)