i'll start the discussion, and then steve klein, i want to turn to you and peter and bob. from my standpoint, twitter has become a key source of news and information, much more instantaneous than even the associated press used to be than i have on my laptop. so as i follow twitter during the course of the day, i can very quickly get a sense of what's being talked about, what's happening, breaking news, and so it has become really an incredible new tool in this 21st century, but it's also become an immobilizing social network tool for activists like the tea party. so steve klein, let me turn to you for a minute. >> twitter is the oldest form of communication we know, and that's word of mouth. it's just new technology doing what we always did before. twitter is a great way to -- it's an early warning to some, really, because so many people are on it. what it demands of us as citizens is media literacy. i think peter, earlier in the day in another class, made the point that people need to, you know, differentiate between what is good and what isn't, what's useful and what isn