BrmTron
Idea
The aim of this project is to create a Tron-like game (it's basically a multiplayer snake game), where each player is carrying GPS-enabled client device capable of Internet access (typically a smartphone) and moves around the city. Client device tracks his movement and reports it to a server. The server collects location data from all clients and distributes coordinates of other players to them. Crashing into another player's trail means game over for you. Winner is the last player, who stays alive.
Status
Design a communication protocol between client and server [IN PROGRESS]
Write server-side software [NOT DONE]
Write client-side software for Android [IN PROGRESS]
Get some testers willing to put forth some physical effort

[NOT DONE]
Augmented reality
Collision detection
There are two main types of environment:
City map
Open space
Can be represented by a bitmap
Not suitable for areas with map available, because of higher memory requirements