In the last few days, I have gotten a bunch of organic search traffic for these Facebook related keywords:
does facebook really work?
face book, how does it work
facebook +invite friend +how to
facebook invite friends
how does face book work
how does facebook work
how does mutual friends work in facebook
how to invite a friend in facebook
how to invite a friend on facebook
invite a friend to facebook
Maybe now I'll get some more :)
Since Google never lies, I am available to help you get $3M for your FB app.