Here is an AWESOME ARTICLE about a couple of real bike cops in Portland Maine. These guys have one of the best arrest records in the city. They ride 12 months a year through the Maine winter. I've seen them on the streets, and they are great. They show-up at the local co-ops to do flat repair clinics for low income youth development.

Which would you rather have come to your rescue? I think those Segway type of scooters are good for a "visible display" of their presence during parades and such, but for day to day police work... not so practical.