Machine Learning Tutorial
http://robotics.stanford.edu/people/nilsson/mlbook.html
Reinforcement Learning:An Introduction
http://www-anw.cs.umass.edu/~rich/book/the-book.html
The Journal of Machine Learning Research
Online Machine Learning Resources
http://www.ai.univie.ac.at/oefai/ml/ml-resources.html
Machine Learning at AAAI
http://www.aaai.org/Pathfinder/html/machine.html
Active Logic - inference engine that incorporates a history of their reasoning as they run
http://www.cs.umd.edu/projects/active/
Machine Learning in Games
http://satirist.org/learn-game/
Machine Learning Group
http://www.cs.bris.ac.uk/Research/MachineLearning/
Knowledge Acquisition for Expert Systems at Acquired Intelligence