I just read that Trent Reznor has released the source files for Survivalism, one of the songs of his forthcoming album Year Zero, in GarageBand format. He's done this before with a couple of songs off his last record, but he's also announced that he'll be releasing every song off the new record as GarageBand tracks over time.
That's just too cool. I had a lot of fun playing around the the previous tracks he released like this, so it should be more fun playing around with these new ones. I really wish more artists would take this idea up!
So go and download the GarageBand project from this page and have some fun! (Even if you don't have GarageBand, or even a Mac, you can still dig into the project and pull out the .aif audio files. Hello Ableton Live!)