NLPStore.com - A great source of NLP related books, CDs, DVDs, and more. Ships internationally and has a secure ordering process.
RichardBandler.com - The official website for Dr. Richard Bandler, co-creator of NLP.
PureNLP.com - Seminars and more information on NLP: Pure NLP® & Keeping It Simple.
NLP-Newsletter.com - John La Valle's newsletter that updates you on the newest NLP techniques and features some great guest articles.