Follow the money?
The latest article from the Plain Dealer Business section dealing with Web 2.0 explains how social networking sites (think MySpace, Facebook) have become the darlings of venture capitalists out to make big bucks. Of course which of these will really hit big is anybody's guess.
The first two, Stumbleupon.com and Slide.com look promising to me. I'll take a closer look at them on another day. I'm exhausted tonight.