Gregory Piatetsky-Shapiro's Knowledge Discovery Mine - http://www.kdnuggets.com
This server has a variety of information on Knowledge Discovery in Database. This includes the KDD Nuggets archive, and a catalog of commercial and public-domain tools for knowledgediscovery in data.
Note: This info converted from the original "The Data Mine" pages and pre-dates June 2001. Please remove this note if you update or check the info