The video is now posted at http://vimeo.com/29391029 .  The slides
(which mostly is all that you can see in the video) are available at
http://ccil.org/~cowan/scheme-2011-09.pdf .

--
Overhead, without any fuss, the stars were going out.
        --Arthur C. Clarke, "The Nine Billion Names of God"
                John Cowan <cowan@ccil.org>