Optimistic people like myself believed that the great thing about the Web was lower barriers to entry and the even playing field that it provided for audience eyeballs. According to a recent Jupiter Media Metrix study, Internet traffic is rapidly glomming onto a small number of sites. The study seems pretty flawed, since it counts in things like instant messaging, email, and Napster with Web usage. It also doesn’t take into account the fact that many of the larger sites publish content produced by third parties. AOL leads the pack thanks to their huge user base and the fact that they’ve acquired a huge number of popular sites.