Right now, we have likely have six people. There are four definites, one friend of a definite, and one probably. So, we could likely fit one or two more people if you'd like. Be warned that the shortest this has ever gone is 10p.
I'm thinking that I'm getting organized enough that we -might- have this more than once a year. I think Advanced Civilization: The Expansion Project would be cool at some point. I've never found a good way to make substantial counters though. Card stock is easy. Cardboard stock seems to be pretty difficult.