Clark Aldrich is suggesting some ideas on the Learning Circuits blog around vocabulary for roles in educational simulations. I think this an interesting direction in discussion simulations and business gaming as well. Not least the concept of people controlling the primary characters rather than the simulation, and the simulation controlling the environment and context, and maybe some of the bit-parts. This seems far more a) achievable given current technology, and b) actually more flexible. The investment to build complex and realistic simulations, is I still think, beyond the budget of the everyday.