Facebook, and I say this with great admiration, is the devil.

First they use your friends to suck you into joining the site. Then they amuse all of your bored friends with games, then they use the games to get those same friends to lure in more FaceBook users and to market/sell things to people already there.

It's referral marketing taken to the nth degree. It's been obvious to me for some time now that it has more legs than Twitter, now it looks like it has more volume (and a better business model) as well.

(sigh)