The Social Networking Revolution

It seems that lately all we are hearing about are how people are "tweeting" and "updating their status." Places in the internet like MySpace, FaceBook, Twitter, and LinkedIn are changing the way we communicate and interact with each other.
If you haven't joined any of these sites yet, you might want to look into one or two, just to give yourself an idea of what is going on with this new communication venue.
Let us know what you think about the various social networking sites here and if you see any educational or class uses that could come out of "social networking."