It used be books only. Now it’s audio and video. Classrooms across the world are quickly ramping up in providing knowlegde beyond the campus halls. Here is perhaps one of the better ways to access this new treasure trove. I am now learning about physics from Berkeley, while riding my bicycle through Amsterdam. I was addicted to their history lectures which i can vouch as being of the highest quality! With the price of a university education averaging around $ 26,000 in the US, we are lucky to have access. I speculate that as this distribution of knowledge continues, we will see communities and discussions that take place online between people not taking the course where the lecture material originates. Will universities tap into this? Probably, and in an experimental fashion.