With the GeoChat Java application, developed by Mattias Rost in the Mobile 2.0 project together with Sony Ericsson, you can open up chat rooms based on where are located - or where you want to be! Using the built-in map, you can open up "chat rooms" anywhere in the world. Want to ask about the temeprature in Bangkok, hear about a Formula One race in Moncao, or discuss the best places to eat in the nearest galleria? Your phone's positioning system can place you in the middle of the action, or you can enter into a chat on the other side of the globe. Below you can see Mattias Rost give a short demonstration of the system.