Note: This series of Web pages contains the slides used in the
presentation at the O'Reilly Open Source Conference on July 27, 2001. An
earlier version -- now out of date -- was presented at BSDCon on October
19, 2000. For the text of the Open Source Conference paper (which is much
more informative and complete than these slides), see http://www.brettglass.com/spam/paper.html.