I think this would be more interesting if it included the behavior profile facebook keeps on you. I've read articles where they describe tracking every page you visit, when, how many times and for how long. Facebook is interested in knowing which of your friends you're paying attention to, who comments you read and which photos you like.

I would like to see their "file" on me. I would like that to be more transparent to users who don't realize it's being kept as well.

Google started doing something like this where they let you see (and delete?) the browsing and search histories they keep based on your gmail account, google cookies and advertising partners logs.