Here's a rich set of resources for SEO.
<a href="http://www.toprankblog.com/2009/09/100-ways-learn-search-marketing/">100+ Search Marketing Resources to Learn SEO & PPC</a>
"How do new marketers learn SEO and Pay Per Click? How do professionals stay current with search marketing tactics considering the sheer volume of social media distraction? Last month we ran a poll of Online Marketing Blog readers to discover preferences for learning and staying up to date with current search engine marketing strategies and tactics. Below are the top categories selected by readers. However, we?ve taken it a step further and listed over 100 different resources for marketers to start, maintain or advance their level of SEO, PPC and any other type of search based marketing. Enjoy!"