Here's an older post which tells a tale of ad hoc social networking - this has everything to do with Long Tail economics and networking.
((Note: I'm rolling back to my Midwest Journal blog, since this is a simpler way to approach things. It's already set up with page links, stats, etc. I just don't have the time to update the other blogs - but they update themselves into my research compiler (gmail) so whatever I post there is fine. And they can all be searched via Google...))
Ross Mayfield's Weblog: IFTF on Social Networks:
"Most technology companies, however, continue to focus on building industrial strength infrastructures to support more formal organizations: e-mail, calendaring, enterprise portals, video and audio conferencing, multimedia communications, and so on. We believe that the real opportunities are in lighterweight tools that support ad hoc teams and spontaneous collaboration within social networks that often cross formal boundaries: instant messaging, phone-, pager-, or PDA-based short messaging, personal Web cameras, peer-to-peer file and screen sharing, and so on. These technologies typically require little infrastructure, completely blur the line between personal and business use, and ignore organizational boundaries."