Twitter in the Classroom

I am a little iffy on how this whole Twitter thing will pan out.  Right now I see it as something celebrities and narcissistic people do.  But I could be entirely wrong about that.  The textbook for the class was helpful in showing me the possibilities for Twitter in the classroom.  But other than that, I am not so sure about this thing yet.  But as I work with it, I hope to understand it a little better and maybe I will be tweeting to parents some day.  You just never know.