There's a great new initiative launched in Barcelona today - Bicing.
It's a municipal scheme to encourage bike usage. You pay €24 a year for a card which allows you to unlock a bike from a fleet of what will eventually be 1,500 bikes sited at 100 stations around town.
You then pay 60 cents an hour for two hours and €3 an hour after that, all charged to your credit card. It's €150 if you don't bring it back within 24 hours at which point you might as well keep the thing and spray paint the Bicing logo and keep it.
How cool is that?