Roamler is a mobile app (currently in beta) that allows people to sign up to perform small tasks based on their location. It's kind of a cross between Zaarly, a mobile marketplace for services, and Fiverr, where people perform small tasks for $5.
It's also very reminiscent of the Japanese service Otetsudai Networks, which mapped people with free time to people who needed casual staff, based on their location. (I remember that one became a real presentation cliche for a while, not least in my own presentations).
Roamler is currently only available in the Netherlands, but the potential is enormous.
Here's one possible use of Roamler, once it gets to a decent number of users. Someone who runs a website might want a picture of a local bar that they can use without any legal issues. They put the call out for someone locally to take a picture of it, and send them the picture. Once they get the picture, and they approve it, they make the payment. Another use might be to make sure a store in another city has one of your products in stock, and prominently displayed.
I love all this stuff. Once lots & lots of people have location enabled phones, we're going to see some fantastic ways of working.
Hat tip - Springwise