Pete is asking what the "Google of Social Networking" will look like. I wrote a comment on his post:
The power of Google was that it didn't require an actual human being to connect up a page. No one had to submit their page, add it to a list, etc.
With social networks, there's never going to be a one stop shop. I use LinkedIn for something, and Friendster for something else, but I can't get on the Facebook. The real power lies in connecting the LinkedIn people to the Friendster people to the myspace people.
I have a social network. I e-mail, IM, link tags /for on del.icio.us, Skype, etc. etc. etc... but nothing ties all the people I contact togethere in a displayable fashion... nor does anything tie me to their friends, etc. Frankly, nothing even ties in the people to themseves... my computer doesn't know the difference between Fred Wilson the Skyper versus an e-mail to Fred Wilson versus the guy I'm tagging links for.
Someone needs to do what Google did to the internet, and what Indeed is doing to jobs.