+I've given a fairly large number of talks over the years. Many happened
+before it occurred to me that it might be worth parking copies online for
+later reference... I still have the presentation materials from many of my
+early talks, and may someday get around to putting some of the old gems
+online. I'm also not good about keeping up with adding new things there,
+if there is a particular talk I've given that you would like to review, feel
+free to contact me if you don't see the materials here.