Social Connections has released MashedIn.com, an application that allows you to identify mutual connections across multiple social networks. MashedIn provides a widget that you can add to a web site or blog where your users can authenticate with either Facebook, Twitter, or LinkedIn to reveal common connections to the widget owner.
Go on, search for your company. I dare you not to find a Wikipedia entry in the first page of results, if you're a company of a certain size or significance. Now be honest--are you engaged at all in that Wikipedia article?
Socrates said that, "the unexamined life is not worth living." In perhaps a parody of this statement the Forrester report, Text Analytics Takes Business Insight To New Depths, states that "unexamined content is a wasted opportunity."