From Andre, Barbie as security token.
Before two owners (I won't say 'girls', it theoretically could be boys. Not that there is anything wrong with that) can chat online, they need to register with each other through physical real-world interaction. Registration involves placing one doll in the docking station of the other (presumably the 'friendship' is recorded as bilateral?).
From what I hear on the grapevine, Ken already thinks Barbie spends too much time with her ditzy friends. And Barbie feels stifled just staying at home doing aerobics. Watch this channel for more juicy doll gossip.