DailyFinance.com

Well, DailyFinance readers, it's been a great ride, but now it's time for me to say goodbye. On Monday, I start a new job at Forbes, where I'll be covering media and technology.

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...