Other Resources:

KDNuggets
ACM SIGKDD
WEKA Data Mining

Background Material:

Introduction to Data Mining and Knowledge Discovery, Third Edition, Two Crows Corporation, 1999. (Local copy in PDF format)

Principles of Data Mining, David J. Hand, Heikki Mannila and Padhraic Smyth, MIT Press, 2001.

Data Mining: Practical Machine Learning Tools and Techniques with Java Implementations, Ian H. Witten, Eibe Frank,Morgan Kaufmann,1999.

Machine Learning, Tom Mitchell, McGraw-Hill, 1997.