Foursquare is not the ball game played by four players. What I am actually refering to is the popular social networking game create by Dennis Crowley, Naveen Selvadurai, Harry Heymann, Nathan Folkman and Mike Singleton with design help from Mari Sheibley. The game is basically played by “checking-in” to different places that you go to. With the help of a GPS equipped mobile phone like the iPhone (although it works with an iPod touch the detected location is not as accurate), you can check-in to these places.

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Chris over at Chili Technologies has started working on a FourSquare app that will run on the N900 mobile phone’s Maemo platform. For the uninitiated, FourSquare is a web service that lets you “check-in” your location when you visit certain places like restaurants, coffee shops, bars, homes, offices. People who checks-in the most number of times in a location gets to be tagged as the location mayor. FourSquare, together with partners, also offers incentives when visiting certain locations.

The FourSquare Maemo app called barrioSquare is in it’s early stages and uses Python and QT bindings for Maemo. Chris is looking for help in developing the mobile app. If you’re interested you can contact him here. Once the barrioSquare app is up and running, FourSquare will be one of those location-based social app that will be available on major mobile platforms.