I started running a couple of weeks ago, which necessitated a new playlist for the treadmill. I hate "workout music" -- it's bland. Somehow we got some mp3s from Biggest Loser, and they're all sped-up dance covers of rock tunes. Yuck.
Here are a few things from my list:
Anberlin - Godspeed (video)
Whenever this song comes on, I basically just want to go nuts at whatever I'm doing, making it great for an extra burst of energy at any point in the run. Really, just about anything by Anberlin will work. Godspeed just happens to be Anberlin in their purest form.
Foo Fighters - Bridge Burning
The Get Up Kids - Holiday
I'm always looking to expand my list, so feel free to leave suggestions in the comments!