Facebook social Q&A service is the harbinger of the death of reference
"Not that this Facebook service specifically will kill reference. But the fact that Facebook has jumped on the Q&A bandwagon is a signal that the last nail on the coffin of library reference was put in place some time ago. Just when that happened is irrelevant. The salient point here is that Facebook entering the Q&A market is like the NY Times reporting on Steampunk: a sure sign that that ship has sailed."