[caps]

I don't think I have any suggestions other than what's in the OP. A chalk board is pretty handy for tracking who's waiting.

My only note might be to have a soft time limit; I've seen players who had lost the game keep playing against ridiculous odds. It can be nice to be able to give their opponent an out to start a more competitive game. "It's been over an hour, why don't you guys count points after the next set of OMs; we've got people waiting for an opponent" etc.