That talk was on Sept 30, 2009, at Stanford's EE380, Computer Systems Colloquium.  <a href="http://www.stanford.edu/class/ee380/" rel="nofollow">http://www.stanford.edu/class/ee380/</a><p>It's open to all.  Almost all talks are webcast and most of the ones that are webcast are available online "forever".<p>FWIW, I introduce Dr. Ungar.