If you feel like doing some more reading, learning, viewing, here's some things to check out.....
Georgetown University: Center for Social Impact Communication: Great resource for more info on social media and activism.
danah boyd: A publishing machine who includes her many many articles on social media available for free.
Mashable: Social Media: Stay up to date on recent social media goings on in the news.
I Know Who You Are and I Saw What You Did: Social Networks and the Death of Privacy. Listen to this episde of the Diane Rehm show on NPR while working on some homework. It's good for you, and very related to Unit 2 and 3.