This guy is really amazing, one of the best acoustic guitarists I've heard, a good vocalist, and a great songwriter. Check out the song Betterman (and then the others) here. And then, if you can find them, the songs Take and What You Want are truly amazing. What You Want is simply one of the greatest songs I've ever heard.
Also, from his website, you can find audio downloads of practically every live show he's done. They're bootlegs, though, so it's not always great quality.