Interesting solution to the parking problem:

Drivers in three US cities will soon be able to earn a buck or two just for vacating a parking space. SpotScout is a website that matches people about to leave a parking spot with those looking for one. Using a cellphone, drivers tell SpotScout when they will leave their parking spot, where it is, and how much they will sell this information for. The site, to be launched next month in New York, Boston and San Francisco, matches this information with people looking for a space.

(Via Marginal Revolution.)