Saw this movie a couple of days ago.
Very special.
The music was very awesome and reminded me a lot of Trent Reznor.
The original music was done by Nathan Larson (former member of Shudder To Think).
The songs of other bands which were played are mentioned here:

Note: David Bowie was involved in this movie too (as an actor).

Can someone help me with the original soundtrack? Cannot find it anywhere on the web.