I don't understand the attraction to "Twitter"

Twitter, the newest internet craze seems like little more then a site to update your status. I heard of it for the first time on a television show and joined, simply because I wanted to see what it was about. Of course, the site forgot to state that the only thing you do on the site is update your status. After joining my head was filled with only one question, "This is it?" I asked myself as I answered the question, what are you doing? and simply left the site. Every other social networking site has a status to update, why would someone join a site simply to change their status? It seems a bit plain to me. Why join a site like that when you could join facebook or myspace and do that and so much more? Honestly, I'm more of a blogger myself. I just don’t understand why people can be entertained by something so simple.