This is a co-operative game, so trading has to be done with the consent of both parties. I can see that as being a potential problem if the players do not respond to trade requests in time. I was thinking to perhaps speed things up by allowing players that are ALL on-line at the same time and have decided their moves to be able to do so without waiting a day. I'm not sure that I can keep the board updated that quickly though. This is an experiment and adjustments will likely be made when issues crop up.