Facebook Guide for Educators [Technology Enhanced Learning Blog via Twitter] - A free PDF on getting the most out of one of the world's most popular websites.
Broadcast Yourselfie: How teens use social media and why it matters to you [Brian Solis via Twitter]
7 Top Social Networks Among American Teens - Facebook is still there, although there's a huge debate raging over whether they're starting to turn away from it.
10 reasons we need social media in education [Life of an Educator by Justin Tarte]