[Brian]

OmniFocus was originally designed around a one-user, one-database workflow. Since we shipped OmniFocus 1 back in 2007, we've gotten this request from a few folks. It doesn't seem to be the way that most customers want to use the app, though - that's why it hasn't been added yet.

That said, one of the things we'd like to do in the future is make OmniFocus easier to use in team-based environments. (Some tasks are shared but some are private.) Once we get that feature in place, this sort of thing will also be easier to do. At the moment, though, it's not possible. Sorry!