Anyway, this is the team-writing of the Future. We sit at our own computers, but using a program called SubEthaEdit. Main feature? It works as a server using Apple's Bonjour protocol, and allows one person to host the document, but any number of users to edit it at the same time. One of us advances the story, the other proofs. Then we'll swap around, touching up each other's work in real time.
It's an awesome way to write; my only complaint is that SubEthaEdit is a text-editor, not a word processor. I'd kill for real-time spell checking, some formatting flexibility, and the like. Even so, I can touch all that up when we're done. Still, if we can track down a cross-platform version of it, we could have some of the most kick-ass writing swarms out there!