I like the part about Fleet Management. Get these on CaBi!
The Boulder bikeshare system has GPS built in to many of their bikes. So the mileage on your account is much more accurate than CaBi, which just uses a straight line from station to station.
GPS on CaBi would allow a flash-mob style coordinated simultaneous CaBi ride with mapping that could allow the results to look like a marching band. Imagine 20 or 30 bikes all tooling around the city in a pre-designed carefully choreographed dance.
We have the Tiles (early adopters!) and have them on our house/car keys at home. They would seem to be good bike locators – the app works well down to a house address… Not too different from a Find My iPhone type technology.