The Roots, the Philly-based "hip-hop band" with 8 albums to their credit, the latest of which is the highly regarded Game Theory, have a fantastic website that captures the element that makes them stand above all others. TheRootsLive.com is an archive dedicated to providing free mp3s of Roots' concerts. The site currently hosts approximately 45 shows that go back as far as 1993, many of which contain video. I'm currently digging their March 13, 2003 show at the Roseland Ballroom.