Squilliam on 29 November 2010
The reason? Firmware updates come out of Japan. Japan as a whole doesn't take multiplayer at all that seriously compared to the west. If the firmware updates had come from somewhere like U.S.A. that feature would have been enabled sometime in 2008 at the very latest. However you would have missed out on those funny updates for photo viewing etc, so its not a good tradeoff. 
Tease.
