The single player campaign provides an interesting twist on the game.  Anyone else think it would be perfectly suited to being a multiplayer tournament mode of sorts? It would be great in a kind of play-by-email style format, where everyone has 24 hours to play their games (or however long they agree upon), with the campaign tracking progress over the course of a week or so.  And, of course, being able to participate in multiple MP campaigns with different people simultaneously.  Probably wouldn't work so well in an anonymous matchmaking style system because of people not showing up to games or dropping out, but it would be really awesome between friends or for community events.  Would be a great way to spend a Sunday afternoon gaming.  Plus the campaign has so much potential as it is - can only begin to imagine all the possibilities it has for multiplayer.