Hayden's Butt Crack is loads of fun <insert endless jokes here>. He and I did it in 2000 or so as a through trip from Govett's Leap, which was a nice little adventure. Then the storms rolled in, Hayden gave me all the metal gear and ran off, leaving me as a human lightning rod on the exposed walk out - lightning was striking the next ridge to the east, about 500m away! Needless to say, I was forced to replace my underpants after that trip...
BTW it might be worth hooking up with Hayden - he's a lot of fun to climb with and has a particular penchant for long scary choss routes! If you haven't done it, Margarine Ridge is a long super classic at a very relaxed grade.
[edit] Hey Chockstone developers - can you please fix Chockie's HTML escaping? It's annoying as crap to have to manually escape < and > every single time!