The following is a list of seo resources for those who wish to learn more or do their own SEO.
Search Engine Watch
SE Watch is a great source for all types of information on search engine marketing.
American Marketing Association
AMA is one of the largest professional associations for marketers.
Institute of Management Consultants
IMC is a professional association dedicated to consulting and management professionals.
SEOChat features SEO forums and tools for the novice and advanced SEO person.
Matt is one of googles engineers who maintains his own blog. All sorts of information can be found on his blog.
Google Information Webmasters
Google Webmaster Guideline is a nice write-up by google itself on SEO and best practices.