Colleagues -- Thank you for your helpful comments about the "colloquium" I tested on May 8. I have incorporated them into the "final" version of the talk, now posted on my web site. The new version also attributes the figures correctly (I believe). You may download the talk (two resolutions) at http://bohr.pha.jhu.edu/~bagger/LC_screen.pdf http://bohr.pha.jhu.edu/~bagger/LC_print.pdf Please feel free to make additional comments. And to borrow anything you like for your own colloquia! Thanks again -- Jon Bagger