Double X

Of three Slate spinoff sites launched in the beginning of 2008, two have already folded. Will The Root, a site targeting African-American audiences, succeed where its siblings failed? There's some reason to think it might.

Why do you think Twitter matters? Why should I use Twitter? Will Twitter be around in five years? As I've become more involved using the online microblogging service this year, these are questions I'm often asked about Twitter. The answer to the first two questions is simple: because Twitter is...