The best thing I could see working for MMO purposes would be some sort of technology like Layar, where enemies, items and other players appear on a radar and are superimposed in reality. The camera interacting with GPS technology would theoretically allow such a game, but someone would have to take the plunge and make it. A similar idea was done with a Pac Man engine by a university a couple of years back but they said the GPS, camera and gaming technology put together would cost thousands per person- not with the Droid! Once they do, though, count me in- it would be great combined with an iPod Video Visor-like device with a phone mount attached, so you could see only the reality/fantasy hybrid, but again, it hasn't happened yet. I can only imagine a Pokemon game like this...