Search Engine Land is a must read hub for news and information about search engine marketing, optimization and how search engines such as Google, Yahoo, Microsoft Live.com and Ask.com work for searchers.
A well-rounded view on search engines and search engine marketing from five segments of the Web population represented by senior members of the major SEO/SEM forums on the Internet.
A one stop shop for webmaster resources from Google that can help you improve and understand your site, connect with visitors, and find answers to crawling and indexing questions
Search Engine Watch is the authoritative guide to search engine marketing (SEM) and search engine optimization (SEO), offering the latest news about search engines.