twitter in the classroom

This seems to be another way to intruduce technology into the classroom - it is a way to keep students on task and a option for collaberation - and since it is limited to 140 characters it keeps it breif - in a college setting it is a way to give a large class a tool for interaction - this morning on the View they were talking about tweets and the law - should you get in trouble if you don't tweet to avoid injury?  Interesting