Classroom 2.0 is kind of like MySpace for teachers. (actual link: http://www.classroom20.com/ ) I'm not sure how else to describe it. Here's how they describe it.
Welcome to www.Classroom20.com, the social networking site devoted to those interested in the practical application of computer technology (especially Web 2.0) in the classroom and in their own professional development. Especially we hope that those who feel they are "beginners" will find this a comfortable place to start being a part of the community dialog and to learn more.I have been playing with it and have been impressed by the friendliness and fullness of the site. At first it seems there is TOO much stuff going on, but after you get use to where everything is, it's great.
I have started discussions to find tools and resources for Eighth Floor classes and have come across some great ones that you will certainly see pop-up in future classes.
I invite you to "be my friend" : http://www.classroom20.com/profile/lamorris.
They also have a college only version: http://college2.ning.com/
I invite you to be my friend there, too: http://college2.ning.com/profile/lamorris
Let me know what you think.