Apple Thoughts: Rent a Zipcar With Your iPhone

"The iPhone can do many things. Now it can even lock and unlock a car and start the engine."

Zipcar is in over 50 cities in North America and the UK, as well as over 100 college campuses in North America, so I imagine that this app will get some usage. For $50.00 USD a year, and $7.00 USD per hour for basic usage (some cars more, some less), you can "zip" around in one of their cars. They also offer discount plans for frequent users. You can find out more about the app and Zipcar here. And the free app is available now in iTunes.