Here are some of my favorites from the many NLP websites out there:
Articles by Steve Andreas at SteveAndreas.com.
Steve Andreas’s blog. New material from Steve and others.
Encyclopedia of NLP online. By Robert Dilts and Judith DeLozier. (I would love to see this content used as the seed for an Encyclopedia of NLP wiki.)
Article series Re-Modeling NLP by John McWhirter. Some of the best thinking I’ve seen on systematically re-thinking NLP in light of newer discoveries and distinctions.
Please suggest your favorite resources in the Comments below.