iOS 5 beta 3 seems to have enabled another feature -- AirPlay mirroring for FaceTime. If this makes it into the final release -- and not everything does -- it'll be fantastic for families and businesses alike.
The ability to easily start a video call and beam it onto the big screen is compelling. Whether it's grandpa and grandma, or the team in England, it takes FaceTime from a small, personal experience to a big, group experience at the touch of a button.
I snuck out to a developer friend's place to try it out, and yeah. Magical.