That's kind of patronizing, of course I know that Facebook has all that information. (And though I'm annoyed at the moment, thanks for engaging me, this is an interesting discussion)
You're still missing the point: when information is put into Facebook by me or others, the intent is to share it with others. Facebook is not a vehicle to do things in private, the entire purpose of it is to share with others, whether that be your list of connections, your photos, how much time you waste on Farmville, or how frequently you communicate with Aunt Tilly.
Facebook is the anti-privacy, it's a public space, a place to get things out in the open. There's nothing private at all about Facebook, and that's the entire point of it. It's what Tim Berners-Lee envisioned the web to be, and what it would have been had he been able to put useable authoring tools into the hands of the masses, instead of HTML being limited to the benighted few that can afford the time investment to learning it and working with a web server.
Google, on the other hand, pretends to be an ISP with implicit promise of privacy, but will exploit the fuck out of your private email recipient list just to try to do what Facebook is doing. Google's core business is the same as Facebook's, advertising, but Facebook goes about gathering data about you in a far more transparent and clear manner than Google.
When somebody gives all that juicy personal information to Facebook, they're doing it with the intent to share and are making it public of their own volition for their personal social benefit. When somebody gives personal information to Google, they're not giving their search terms to Google in order to share search terms, they're doing it get something else in exchange, but may very well wish they could keep that juicy personal information completely private.
IMHO, trusting Google more than Facebook or Microsoft or Apple is extremely foolhardy, and a testament to how far a catchy slogan can go on the PR front. It doesn't matter how well-intentioned the people at the top of Google are, failures to adhere to policy will happen, and the Buzz incident is just how flagrantly Google will fail at "not being evil" when they're desperate.
I should note that my Facebook account sits idle because of my paranoia about it. But at least everything Facebook has, I wanted to be public. Google has me by the balls.