Slashdot has a story on XWT (mentioned previously). Adam Megacz, the author of the system, does an excellent job of defending and explaining the concepts of XWT in the discussion thread attached to the article.
This is Slashdot on XWT by Simon Willison, posted on 26th June 2002.
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Previously hosted at http://simon.incutio.com/archive/2002/06/26/slashdotOnXwt