What I listen to usually depends on my mood, but here's what I've been listening to lately while coding:

101.7 WFNX Lynn/Boston
Diseased Media Society
The Vandals
NIN
MC 900' Jesus
N.W.A.
Urban Dance Squad
Die Krupps
Eve's Plum

When I'm writing documentation for code or feature support, I usually listen to something lighter. Philip Glas, Lori Carson, Scott Joplin, or Tori Amos.