Social Networking Ranking

Who's the most connected of us all? Craig of Craigslist? Sergey Brin? I think that it's certainly possible to rise to the top of one of the many new social networking sites with a concerted effort, but to what end? Perhaps there should be a larger ranking site that could say definitively that person X is the most socially networked person at moment Y. Would it merit a reward? Would that person be laughed at? Is Web 2.0 a cruel hoax? This idea is more of a question, does social networking mean something for real? if so, what?