Internet radio apps like Pandora and Slacker are fine, but when you want the human touch, Turntable.fm is the way to go. Join a room, and you’ll find other users spinning their favorite songs before an audience of avatars. You can also be a DJ yourself, and rack up experience points by playing songs people like. Even if you never get on stage, you’ll surely learn about lots of new music just by hanging out.
Link: Turntable.fm