Yo! Buckzmom, here! only a year late..... I haven't signed on in a while, sorry!
Yes, madtoto is definitely the way to go. They are based in Overland Park out of the Scooter World shop off of Metcalf.
Scooter World sponsors a rally every other year in May, called the Tornado R'Ally. It's a ton of fun and very well put together. The rally brings in riders from several states. The next rally will be in 2012.
There is another group that rides more frequently KC Scooter Riders. They have a forum at http://kcscooterriders.forum-free.ca/
Very nice group of folks. They meet and ride all over the Metro Area....
You can also find them on facebook!
I don't group ride very often. But if you see a burgundy Vino 125, chances are good it's mine. Introduce yourself....
Deb aka Buckzmom