I love the work of Milton Friedman, and think he has become more relevant in the Obama years in America than perhaps he ever was during his lifetime. The Nobel Prize winning economist was a continual advocate for smaller government, lower taxes and freer markets - and would put his arguments forth in a way that could rarely be combated by his opponents. I have yet to see anyone take on Milton Friedman in a debate and win.
As a result, I have found some of his work on LibertyPen, a great YouTube site, full of conservative and libertarian videos. This one is a great example of the work of Friedman, where he goes into a University, and answers the many questions that the (often) left-wing students have about his work. The crowd is quite rowdy but it is clear that many are gobsmacked by his arguments, and a greater number are entirely convinced. An example can be found below.