As the founder of LinkedIn, Reid Hoffman has a clear reason to tout the power of social networks.  But while most users associate LinkedIn with recruiting and job-hunting, Hoffman wants us to consider some of the other ways a site like his helps businesses, like say, for example, figuring out a way to get a giant shipment of concrete from one continent to another.  

He raises at least one interesting point for managers to consider: how do you find the right level of social network activity for your staff?  The opportunity to problem solve by expanding your knowledge base beyond your own office seems a great one.  The danger of staff "time-wasting" seems to be a significant danger.  It would seem that the right managers have to determine the proper balance as social network sites like LinkedIn continue to grow.