If you're a fan of electronic music, di.fm has electronic and dance internet radio stations available for streaming. It's great to listen to while questing, raiding, or browsing MMO-Champion's forums.
http://www.di.fm/
Stations
Disco House
Dubstep
Classic Trance
Tech House
Psychill
Chillout Dreams
Eurodance
Club Sounds
Trance
Vocal Trance
Electro House
House
Soulful House
Classic EuroDance
Progressive
Chillout
Lounge
Ambient
Goa-Psy Trance
Minimal
Drum 'n' Bass
Techno
Hardcore
Hardstyle
Exposure NYC
Funky House
Tribal House
Hard Dance
Space Music
DJ Mixes
Oldschool Electronica
Breaks
Future Synthpop
Gabber
Replay