I recently found out ( listening to an audio commentary for War3, heh ) about an internet radio that has 24/24 7/7 nonstop music picked from random gaming soundtracks. Only console games, though. You can choose between 128 or 24 kbps speed. I like it. I can only listen to my own soundtracks and mp3 so many times a day!
Link is : http://www.gamingfm.com