There was a quick presentation by Kevin Slavin of the 6 major constraints and problems of mobile-locative games:
Communication is the revenue generation. SMS inter-team communication
Dangerous because people can be tracked. How to cloak and hide identity or location while still playing the game?
Boundaries of Wifi cloud are part of the game. But how in general to deal loss of connection and location?
5. Adaptable Field
How to deal with the constaints of the location technology?