As an "older" person I have never gotten into MySpace or Facebook. I can see some value in this forum idea for the sharing of teacher related issues and curriculum and instruction sharing. I could not getinto the onelisted in the assignment for teachers butI was able to get onthe following sites which I thoughthad value:
http://education.ning.com/ which contains gadgets that rock and has relevant forums for the improvement of classroom and professional development
http://mathteachersrus.ning.com/ which is a collaboration siteformathteachers and coaches!