I just got done signing up for diigo.com and spending some time searching for resources to bookmark. One site which I found was twitter4teachers. I am one of those people who are still not 100% sold on the value of twitter for teaching. I did sign my name to a list of science teachers and middle school teachers who use twitter. I am hoping that this site will help me to find and connect with other teachers who have the same interests as I do. It might be a site worth looking at. http://twitter4teachers.pbwiki.com/FrontPage