It seems the work I did for my Masters dissertation on Location Based Services back in around 2001 is finally coming in to play with the emergence of Location Based Services and the imminent launch of a new iPhone with built in GPS, according to Mac Rumors :

“The use of location in mobile phone applications is a growing trend. iPhone developers are already working on location-based social networks and even a massively multiplayer online role-playing game (MMORPG) set in the real world”