Forbes -- ...Social networking Web sites like Friendster, Orkut and LinkedIn hit the hype stratosphere last year, pitching their ability to find one a mate or a job. But a more sensible business idea is to sell the Web idea as software to companies to figure out who knows whom, and how well, to close more deals. Why cold-call when someone you know can introduce you? New firms like Spoke Software in Palo Alto, Calif. and Visible Path in New York City let you search address books, in-boxes and call logs of employees, investors, lawyers or anyone you consider part of your company's ecosystem.