Here are some NLP/ML/AI links:
http://jmlr.csail.mit.edu/papers/
http://jmlr.csail.mit.edu/papers/special/feature03.html
http://www.daviddlewis.com/resources/testcollections/rcv1/
http://www.ai.mit.edu/projects/jmlr/papers/volume5/lewis04a/lyrl2004_rcv1v2_README.htm
http://www.cs.berkeley.edu/~klein/cs294-5/index.html
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