An endless topic among developers is, "What music do you listen to while coding?" So here's my latest entry -- disc 2 of Moby's Hotel. It's all ambient, no spoken words, and fits very nicely into the background. Music with words winds up getting me distracted when trying to concentrate on something else.
My previous favorite in this type of music was Music for Airports, Bang on a Can doing Brian Eno. Jeremy Zawodny mentioned this as good coding music a while back, and I found the disc on the South Side shop on Carson around 12th street, whatever that's called.