LinkedIn essentially has the graph of business professionals in the US and abroad. It's not the same as connection on FB or Twitter or elsewhere -- there is gre

LinkedIn essentially has the graph of business professionals in the US and abroad. It's not the same as connection on FB or Twitter or elsewhere -- there is greater context. And yet, the features of LinkedIn are essentially just the connection base, and marketing to the network. It seems there is much greater depth that could be explored there, and that LinkedIn could be so much more than the Great Public Rolodex that it is.