On April 7th 2005
Richard Stallman was invited to the University of Pittsburgh (By The University of Pittsburgh's ACM Chapter) to give a presentation of the goals and philosophy of Free Software and the GNU project. I have PDF and PS versions of the flyer here (PDF) (PS)
This isn't the best quality since I recorded it from the audience with a low quality microphone. Other than the annoying hard disk writes every four minutes, I'd say it came out pretty well.
Get the ogg here 22.7MB
for more information about the GNU philosophy please visit http://www.gnu.org/philosophy/philosophy.html