Anybody that has played Portal -- or at this point, heard someone espousing the virtues of Portal -- has likely come across the musician Jonathan Coulton. His song from the ending credits, "Still Alive," has reached near mythical status in the realm of geekdom and potentially beyond.
But Mr. Coulton is far from the only geeky musician out there. There are some obvious inclusions in a list of geeky musicians, such as mc chris, Freezepop and, of course, Weird Al. There are also, however, a number of musicians, bands and groups that exist just far enough out to the side of what might be considered mainstream that they deserve to be spotlighted.
This is by no means comprehensive. For more artists, check out Nerdapalooza or Penny Arcade Expo. The first is a nerdy music festival while the second typically has concerts at night featuring many of these artists and more.