Really fascinating article from Slate that questions the idea of Web democracy through user-generated content sites like Wikipedia and Digg. The author raises some great points. Tal, this reminds me of the book you edited!

Quoted: Social-media sites like Wikipedia and Digg are celebrated as shining examples of Web democracy, places built by millions of Web users who all act as writers, editors, and voters. In reality, a small number of people are running the show. According to researchers in Palo Alto, 1 percent of Wikipedia users are responsible for about half of the site's edits.