Fencer: If I were to implement a multi-player game like the proposed Strategy War, I would allow any time control that's now possible with regular games. Which means that if a turn starts, the clock of all players start to run. If a player moves, his/her clock stops. If all players have played their move, the moves become visible for the other players, the system resolves the moves (count scores, etc), and the next turn starts (all the clocks of the players run again). That means if the time control is five days/move, but all players have made their move on the second day, the next move starts on the second day. This still allows the possibility for weekends, vacation days, and even a Fisher clock. I would not allow a player who has timed out to get back in the game - once (s)he has timed out, (s)he's supposed to be out of the game. For strategy wars, the system makes the rest of the moves for the player. In a game like 10000, I'd let the system make non-scoring moves for timed out players. For say, multi-player Ludo, I'd remove a timed out player.

This doesn't answer the question "What to do with players resigning?".