Tom Morello, "The Fabled City", off his album by that name.
Yeah, I know I've done this one before on the blog. But I've been playing it over and over for the past few days. By "playing", I mean actually making music, not listening to it. You won't see that, for legal reasons (Tom is probably cool about me covering it, but it'd technically be a copyright violation). So you get the real thing, which is far better than anything I do anyhow :).
- Badtux the Music Penguin