http://www.thetubemusicnetwork.com Saw a sample broadcast this afternoon on the local FOX station. They promise all-music, only music--no commercials, game shows, "reality" shows, awards shows, cartoons... I dunno. I think it was done, like 25 years ago?
At least they have okay taste for their pop music.
The website is very Flash intense, but if you look under "Corporate" you'll find a sub-page where you can ask for a press kit--which I bet/hope includes a sample DVD.
FP