Yammer. Even though it launched in 2008, I had only heard of it this semester. And it is actually very interesting. I'm not tech savvy and unfortunately it doesn't come with instructions but professors on campus are trying to incorporate it into activity amongst themselves and their students.
Penn State has a proud tradition academics, football, drinking and... porn? Apparently so, since Penn State student Aisha Jamal (aka "Laila Rose") will appear in the April 2011 edition of Playboy with, um, lots to share.