If you're a fan of stand-up comedy, we have your Holy Grail right here: DAVE CHAPPELLE and CHRIS ROCK are talking about going on tour together.   Chappelle made a surprise appearance at a club called The Comedy Cellar in New York City on Tuesday night. After doing a 45-minute set, Rock jumped onstage, and the two of them riffed for another hour.

When the subject of touring came up, Chappelle said, "After next Tuesday, I'm free for like 11 years." Rock added that he'd be free to do some dates by Halloween.  Obviously, nothing is definite yet.  

(Gawker)