I saw a lot of sad tweets tonight about Ning's announcement from tech educators I follow on Twitter – educators who created classroom "nings" (mini, user-created social-network sites), professional-development "nings" and activist "nings." Creating a site on Ning will no longer be free, I read in CNET, "free" being just one of the service's attractions to educators (and a whole lot of other … [Read more...] about No more free nings