LinkedIn essentially has the graph of business professionals in the US and abroad. It&#x27;s not the same as connection on FB or Twitter or elsewhere -- there is greater context.<p>And yet, the features of LinkedIn are essentially <i>just</i> the connection base, and marketing to the network.<p>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.