Share your favourites.

I recently discovered the joys of Jonathan Coulton, here are a few of his songs.

http://youtu.be/zidiWe9yq88 - I Feel Fantastic

http://youtu.be/qYodWEKCuGg - Code Monkey

http://youtu.be/IUPu_ipbVB0 - Ikea

http://youtu.be/Ltjbnyvq_SI - Baby Got Back

Not quite sure what is classified as Geek Music , but give these two a try:

Alex Goot - Pretty Eyes

Rymdreglage - 8-bit Trip