Last year (2010) in September, New York Magazine published their "Establishment" issue asking who really runs New York. Some of the answers were expected (Bloomberg, etc.) but some profiles featured personalities I wasn't aware of (or some who I learned more about.) Most memorable were David Tepper, Gary Barnett and Nick Denton.
Check out the articles here: Tepper, Barnett, Denton as well as the whole issue HERE. Side point, the New Yorker did a piece on Nick Denton of Gawker around the same time - check it out HERE.