When I was finally able to play a game it froze after a few turns. I wanted to play another, but nobody would be on for another 4 hours.
It just seems logical to make it at least a little shorter. Unless they develop a chat room you can go into from your pda, it will be hard to arrange a match . A shorter interval gives players more oppurtunites to blow each other up. 30 minutes might be a little to short, but it should be no more than an hour.