Interesting article on NYT about Facebook's new Facebook Questions.
The hive mind concept has been around (Yahoo! Answers, Google's defunct Google Answers), but with the advent of Twitter and potential for immediate responses amongst trusted peers such services are heating up.
It would be interesting if, instead of pulsing the entire mass of Facebook, one could ask trusted user groups. In my mind, this would be librarians/libraries. Just another way to insert library services outside library walls (and more user-friendly than most virtual reference). Food for thought.