"Model United Nations" simulations are used to teach UN activities to college and high school students. Most of it is done face-to-face. I've only seen one online simulation and it does not seem to be opensource. Here is its link.
Electronic Model U.N. site: http://www.simulations.com/projects/emunhs/
Can anyone familiar with MUNs give us an idea or outline on how something like this can be set-up in Moodle? Oh, I am not exactly familiar with the simulation itself but is very interested in applying it.