LEGO have recently (i.e. yesterday) been handed the keys of the unofficial 'LEGO' group on Facebook by the original founder; they apparently approached him about taking it over & he was very happy to let them ... LEGO seem to be very impressed that it has almost 1 million 'likes'.
It's being managed entirely from within the company (i.e. it hasn't been outsourced), and they've got 4 people who's job it is to monitor & engage with people via this group.
Anyway, can't stand facebook myself, but if you're interested & aren't already a friend ...http://www.facebook.com/LEGOGROUP