Do you know RoboCup? In the software version, you can program your own football players and then have them competing against the players of someone else. You can use whatever technique and the goal is to score more goals that the competitor. “It is an attempt to foster AI and intelligent robotics research by providing a standard problem where wide range of technologies can be integrated and examined.”.
With a similar goal, some researchers are working on a trust competition testbed. The idea? You program your player in the “social game”, have it playing against (or with?) the other players and at the end evaluate in some way her performances (how well she reasoned about trusting other players and information in order to reach her objectives). And we can also evaluate how the “society”, intended as the ecology of players, evolves (or not) based on the different, local behaviours. Anyway, if you are interested, check the Trust competition Rules (longer pdf version) and Trust competition FAQ. Want to play with the Java code? Unluckly, not yet possible but I guess you might obtain the code if you email them. Release of the testbed distribution is being withheld until July, 2005. At that time, the testbed will be publicly available for experimentation and competition practice.