Fix My Street is a British effort similar to 311 in New York City and San Francisco. The deal is that you see a problem, maybe a pothole, and you can report it to local government so they can fix it.

Even better, they have an iPhone application, with more smartphones to follow. You see a problem, take a photo with your phone, and upload the report immediately.

Check out this demonstration, and here for a report generated via a phone.

I feel this is a really big deal, useful, and a model for more.