Not submitting a turn over this long a period could be taken as a sign they don't want to play any more. If it isn't completely hopeless, maybe a sub could be asked for?
Heh. I'm going away for a business trip next week, and my internet access will be intermittent. Particularly considering how close things possibly are to the end of the game, could I get an extension of our timer to 96 hours for the next 3 turns?