Some years ago, I went to the Free Software Foundation’s annual member meeting. It was well worth the trip, but Eben Moglen’s talk was worth the price of admission.
I have become interested in his talks over the years, and I intend to bring them to a wider audience. Here’s one recent talk from the HOPE 2012 conference (and the transcript is available as well—local copy). This recording is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 3.0 license.