I can't really think of any others at the moment, apart from this one I just found on YouTube by some guy calling himself Jason Lightning Tiger and appears to be playing covers wearing this bizarre satanic clown like mask.
It's a great idea I think, it's quite funny and it adds mystery to it. Who could it be?
Anyway he's done a cover of Don't Cry That Way, which I thought was not bad, a little bit flat but otherwise a pretty tight musician who should probably be playing in a band or something and probably is!
Toadies singer Vaden Todd Lewis and former Rev Horton Heat drummer Taz Bentley covered Czar as the Burden Brothers. They were supposed to record a studio version but never did. They did play it live alot and it was released on their Live DVD.