The list from book Data Mining by Mehmed Kantradzic 2001 WILEY-INTERSCIENCE
(the book is OK but a bit too scientific)
Note some links may be old
http://ocw.mit.edu/OcwWeb/Sloan-School-of-Management/15-062Data-MiningSpring2003/CourseHome/index.htm
(this one from Armen)
www.the-data-mine.com
www.almaden.ibm.com
www.kdnuggets.com
www.pcwebopedia.com/data_mining.htm
www.resarch.microsoft.com/datamine
www.santafe.edu/~kurt/dvmvendors.shtml
www.stat.ufl.edu/vlib/statistics.html
www.marketingtools.com
www.spss.com/clementine
www.datamining.com
www.hnc.com
www.datamind.co.uk
www.jda.com
www.pilotsw.com
www.ncr.com
www.palisade.com
www.ics.uci.edu/~smyth/courses/ics278/dmlinks.html
There are more around, but I think this is wnough to start.