Holy shit last night was INSANE!!1111!!!!!!!
They did the pumpkin run down the pearl street mall (a bunch of naked people running down the pedestrian mall wearing pumpkins on their heads), loads of people, some really awesome costumes, japanese tourists posing with drunkards, it was the bomb! I'll put up some pics if I can get them from my friends. I get the feeling the police are gonna curtail the fun a bit more next year.
Best costume: 5 guys dressed up as giant tetris pieces walking around together... they seriously just looked like tetris pieces with legs sticking out... I don't know how they could even see where they were going.
I dressed up as a tramp.

h: Giant spring loaded knockers and a wig... needless to say, I got groped a lot.