I think it gens an email after each session i.e timeout. But would be useful to have an email when the next turn is created - could create a wealth of emails but would certainly save having to continually check whether everyone has done their turn.
In addition when creating a game would be useful to have an option to remind last player. If the player who is last to do his turn hasn't created his turn for an hour - so everyone is waiting for an hour then game to email him to remind him that the game is waiting on him.
Tals