Vivek Wadhwas comments are a bit unfair in my opinion. "Students are flocking to computer science because they dream of being the next Mark Zuckerberg, not of saving the world. "

One could argue that social media applications like Twitter and Facebook went a long way towards facilitating the revolutions in Egypt, Tunisia and the growing conflicts in Libya/Yemen. No one technology "saves the world" necessarily, but I think Twitter and Facebook don't deserve to be set aside as merely "fun."