This year? As in 2006? You must be joking, if the city is not offically i dont see what will stop people from just showing up.
As for Corbin, It is best to go down to there shop and get the seat cut right then and there. I have done it for both the bikes i owned, my Sporty (RIP) and my Softail. For the Softail i did it Hollister Weekend, and it can be a little crazy and busy but once they start working there magic, damn can they make a difference. Its a long wait, but there is a lot of cool scoots there to check out a few guys setup boots on the Corbin lot. Also you get to test ride the seat so they can make cuts and add things to it to fit you bum. Its a great thing to do for you rear end, and i know everytime i get a scoot the first place i am ridding is to Corbin to get a seat.