I spent a little time last night making some last.fm playlists appropriate for wreaking havoc and destruction. You can find them here: http://www.last.fm/user/Valentia/library/playlists
Caveat: My music tastes run toward the subterranean, for the most part, so if you like country or hip-hop you may not be entertained.
I believe you need a free last.fm account to play them. There are many, many full-length streamable tracks on each list, so if you share my tastes you will have quite a bit to listen to. Enjoy!
EDIT: Here's a link to the last.fm FAQ, which tells about subscriber vs free acc't benefits, among other things: http://www.last.fm/help/faq
