Jed sez, "Google regularly brings in speakers to give 'tech talks' on all sorts of subjects. They've started to make some of these talks available for free (with the permission of the presenters) to the rest of the world via Google Video. You can find them by following the link, which does a search for [Google techtalks] at Google Video. For example, there's a talk by Peter Patel-Schneider of Bell Labs on 'Knowledge Representation and the Semantic Web,' and a talk by Lauren Weinstein on 'The War for Privacy Rights.'"
(Thanks, Jed!)