Everybody loves social networks but not everybody understands the risks associated with it. PleaseRobMe is a great tool that shows you how exposing your location on social networks can make you vulnerable to burglars. It uses actual examples from FourSquare and Twitter and displays messages from people who have left their houses.
DawsonITE is a blog devoted to Educational Technology. It's compiled by Rafael Scapin, Coordinator of Educational Technology at Dawson College in Montreal (Canada).