A couple of threads with conversations during the canonball between those participating and those encouraging:
Official MV 2012 thread: http://modernvespa.com/forum/topic97...ight=canonball
2012 rules thread: http://modernvespa.com/forum/topic75...ight=canonball
Offiicial MV 2010 thread: http://modernvespa.com/forum/topic71...ight=canonball
They changed the rules this year and you cannot have a scooter with more than 250cc for 2014 see http://www.scootercannonball.com/rules/rules-2014.pdf
If your scooter qualifies, you can calculate your handicap here: http://scootercannonball.com/
Because of the rules change there are some other alternatives cropping up:
None of those are restricted by scooter size.