The only music station I EVER stream, because I'm stubborn mind you, is KCRWmusic from
http://www.kcrwmusic.org
It is a land-based station, aka - you can get it on a FM tuner.
Well, thats not totally true. The REAL station is kcrw.org. KCRWmusic is ALL music, and not the talk that is intermixed with the music programming. So all the music programming is re-broadcast on KCRWmusic, so we all can enjoy it.
rap, rock, folk, dance, techno, it plays it all. Find the program that you like, and you'll love it to death.
Personal favorites:
Metropolis
Morning Becomes Ecletic
Open Road