Steve Andreas provides an array of articles and further explanations about NLP. More articles, including several NLP exercises and demonstrations may be found at NLP University.
People who wish to participate in interactive discussions about NLP may wish to check out Steve Andreas's blog
Books and DVDs on NLP are available at Real People Press
Those interested in taking NLP training or in purchasing training materials can check out NLP Comprehensive or the NLP and Coaching Institute of California or NLP University.