I don't use pandora any more, after they cut me off at 40 hours/month or whatever. Switched to last.fm, no limit and much fewer commercials.
I generally listen to "Black Eyed Peas" radio. Not typically my type of music, but upbeat for working and not intelligent enough to be a distraction. Trying out Thievery Corp now, seems interesting.
Bonz - Cake! Thanks for the reminder, will plug that one in, in a bit.