An example for you folks: with FCP7 multiple editors can use the same clip (located on a shared drive) in each of their timelines and edit with it concurrently, meanwhile an FX artist is able to update the clip, the changes are reflected in any edits referencing that media.
Can’t see a way we can be that slick with FCPX at the moment, I’m hoping there will be some kind of FCServer solution for collaborative needs.