[mindcrime]

http://mahout.apache.org

http://machinelearning.reddit.com

http://mloss.org

http://jmlr.csail.mit.edu/

http://shop.oreilly.com/product/9780596529321.do

http://www.amazon.com/Algorithms-Intelligent-Web-Haralambos-...

http://www.amazon.com/Mahout-Action-Sean-Owen/dp/1935182684/...

http://www.amazon.com/Collective-Intelligence-Action-Satnam-...

http://www.amazon.com/Machine-Learning-Hackers-Drew-Conway/d...

http://www.amazon.com/Machine-Learning-Action-Peter-Harringt...

http://www.metaoptimize.com/qa

http://stats.stackexchange.com

[grantjgordon]

Thanks so much!

[mindcrime]

I almost forgot, there's a great thread on this topic on Quora as well:

http://www.quora.com/Machine-Learning/What-are-some-good-res...

LOTS of good stuff there. Have fun!