Hmm, interesting ideas Sangahm. 14 days would probably be a good length of time to keep things moving once there are per-game time limits. I don't quite want to penalize people for making a game in one move but not the other, though. I'm imagining that that might make a feeling-stuck player stop moving in all of his games, not just the one he's stuck on. That's on the global level, though, as a per-game enabled option I could see that working.
Gogeter, thanks for the feedback.