Though its not as popular or mainstream, I have found the basic principles of SEO explained very well (and debated) at http://www.seo-theory.com/ http://www.seo

Though its not as popular or mainstream, I have found the basic principles of SEO explained very well (and debated) at http://www.seo-theory.com/ http://www.seo-theory.com/ Also Google SEO guide http://www.google.com/webmasters/docs/search-engine-optimization-starter-guide.pdf http://www.google.com/webmasters/docs/search-engine-optimiza... [pdf] is a very useful resource. I have had great success with these two resources