Pitboss is like a "real time pbem". Every 12 (?) hours one turn passes. During this time you have to make your turn (similar to a democracy game, where you get a punishment if you dont finish your turn within the timeframe). One server is needed to host the game as long as possible.
Member of the Guardians Clan - the only clan that could carry its success in civ4 to civ3 ;-) "If we don't succeed, we run the risk of failure." - Dan Quayle also known as "Reptilio" on the EU-Boulderfist realm (me, not Dan Quayle)