My latest endeavor is called

the Athens Yellow Bike Taxi Service
or AYBiTS

A free bike-sharing program intended to provide accessible transportation to the Athens area.

Here's how it works: We build bikes and let them loose in the city, each with a lock and information on how to reach the bike co-op. Whoever wants to use the bikes comes and signs up for the service by giving us some contact info and making some sort of donation. We then give them access to the locks and instruct them on how to use the bikes responsibly. They can then use any taxi they find for the day and leave it locked in a public place when they are done with it. If they want to secure a bike for a short time, such as while they are in class, they can provide their own lock and "double lock" a taxi for up to two hours. Problems and changes are addressed by sending mass e-mails to everyone who has signed up.

If the program grows big enough, it may actually become something like a chartered taxi service with pedicabs.