Part of the algorithm may involve them trying to predict who you will want to add as a friend. People that attended the same events as you, people who have recently added your friends as friends, stuff like that.

Would it be possible for somebody to create a virus that would grab this file and publish it to people's profiles? I think I'd crawl into a hole and die if my ex girlfriend discovered how highly she ranked...

I've been waiting for the day when something is breached and you can see who's viewed your profile...all hell will break loose

I'm kind of sadistically hoping Anonymous comes through on their promise and starts some kind of Facebook apocalypse like that.

What Anonymous should do is claim they are ready to do this and give everybody a couple days notice to remove their accounts before the hit. lulz would ensue if they could get the media worked up, which I bet wouldn't be that hard to do.

it seems like it has happened very briefly, http://www.mobileinc.co.uk/2009/12/facebook-app-uses-exploit...

My wife is ranked really rather low... bad news.

Not necessarily, if you see each other everyday there's no real need to interact through Facebook.

Facebook once suggested I reconnect with my wife. I saw that as good news that we were interacting in the real world not on FB.

Low is high in this instance. Unless you were aware of that and saying her high count was a low ranking.

That would require the virus to successfully log in as you, and at that point does it matter?

Well, this script/data now has the increased effect of being very socially detrimental. It would be absolutely awkward as hell if data like this came out to friends.