Have you checked out MTV's Overdrive? I love it. (I'm a sucker for the Real World...) You can watch one of five stations..TheLineup,Movies,News, and On TV...Two different ways. You can watch it like conventional tv, or video on demand. (you can pick the programming and playlist)
The videos,music,and studio concerts are streamed and the resolution is 416-by 312 pixel. I don't like the fact I can't use it with Firefox (requires Active X controls...but I can live with it.) Also it's encoded with Windows Media codec,so you have to accept DRM. It's encoded at 700 Kbps...so broadband is a must.
MTV news is shot in enitirely for the web now...so you see the whole program as opposed to the small amount shown on MTV.