If you want to use a scooter for transportation long-term (and I see a lot of people doing just that around here), you'd probably be better off with a Xootr. They're made to fit adults and they fold so you can carry them onto the bus or into businesses easily.

On a sort of related note, I have the folding cart that they also sell, and I consider it key to successfully being car-free. When I'm not traveling by bike I use it to transport groceries, computers, packages, and pet food and litter. The footprint is small enough to take onto the bus without blocking the aisle. When I go to the farmers market I strap one of those plastic Christmas wrap storage containers to it and I have a rainproof shopping cart.