Stars of the Lid is great, thanks for the recommendation. I tend to listen to ambient stuff when coding. Shpongle, Bonobo, Boards of Canada, Andrew Coleman, Bill Laswell, Birdy Nam Nam (definitely not ambient), Broken Social Scene are all good.
I've got to second Boards of Canada.
Also, Four Tet, Alan Sparhawk's solo guitar (his band, Low, is some of my favorite music for when I'm not hacking), Sigur Ros, Collections of Colonies of Bees, Mouse on Mars, Do Make Say Think, Squarepusher, Dirty Three, Six Organs of Admittance, and Labradford
