Google Social Search, True or False Dichotomy

If you dig past the hype, it's very much like Collecta inside of Google's normal search. These forms of search are dominated by twitter, and to a lesser extent blogs, but other data streams are coming in. Public Facebook data is on deck.

How can a service cross the chasm between our social connections and our web usage without full relationship information from the user?

I'm zealously interested in this question, as it is vitally connected to my future if I want to build virtual search agents customized to users.

Awesome links and videos! Thanks!