Dyplo games are games set up using PitBoss server. Server is up 24/7, there is around 20 players playing in such game. Time to execute one turn is set to 24 hours, so one Dyplo game takes around four months to complete. During game players identify themselves with their civilizations, create official and unofficial alliances, write chronicle of game.
Each player has to make his turn during each day. Of course built-in mechanism od queueing orders for units, production in cities etc. might be used.
We have played two such games, third one is played rigth now and we're finishing preparations of fourth edition