What I've done with the Traveling Portfolio is to make a list so the portfolio moves in the most efficient way possible (geographically at least!), accounting for issues like willingness to pay for international postage. On a little disposable camera, that's not as much of an issue, so you can just go by geography and postal rates.

Just have everyone pm you their address, make up the list, and Sean can probably set up a password protected page for the address list for the group, like we have for the Traveling Portfolio and the Postcard Exchange, and it's also a good idea to include a copy of the list with the camera, in case someone gets it and temporarily doesn't have computer access for some reason (this has happened with the portfolio!).