We’ve probably all seen movies where special agents locate eachother on a GPS map and chat. We can actually do that in real life now, if you live in Japan and happen to use NTT DoCoMo’s newer FOMA phones (903i series or beyond). All you have to do is to have the iMapFan JAVA application running at the background, when a friend locates you, a message will be sent to notify you to switch back to the chat screen. The service charges 25USD per month, and you only have to pay when you hold the conversation, it is free for the person invited. — Sam Chan
Press Release [Mapfan Japan]