You’ve got to love the internet. Videos were posted up of Naughty Dog reps running through multiplayer details for Uncharted 3. The videos were made private soon after they went up, but a keen fan was able to get a hold of them before they went into obscurity and made a compilation out of them.
Granted, the fan commentary is bloody annoying. Regardless, there is a lot of new info here on the multiplayer so these videos are worth checking out.