Two voice communications programs you can look it: Teamspeak, Ventrilo. I think both are free (I'm certain regarding Teamspeak but I never used Ventrilo myself). I've been chatting with 20 people simultaneously on a Teamspeak server, and there are obvious benefits compared to text typing in time critical situations. Also, there's some inherent limitations in voice communication: Social dynamics start to play for the better or worse with regards to shy people etc.. Also I'd imagine lying becomes more difficult for those unused to lie IRL. :rofl: But that could also prove an interesting experience...