I'm a huge Led Zeppelin fan and I think John is the greatest drummer ever. In fact, I named my dog Bonham after him.

Apparently some long lost out-takes have surfaced, but nobody's quite sure if they're authentic or not. It sounds like him, and there are over 20 tracks. Here is the story from blabbermouth.net and here is a direct link to the tracks. If you're a fan, give them a listen. They're mighty impressive.