Right now I'm listening to Liberty Feelup off Life Without Building's live album, Live At The Annandale. Their style's a fascinating stream-of-consciousness post-punk sort of thing. Recommended.
Leadbelly: In the Pines (or Black Girl if you prefer)
Robert Plant & Allison Krause: Sister Rosetta Goes Before Us
BAD II: Rush
Pickin' on Zeppelin Tribute: Kashmir