SEO by the Sea http://www.seobythesea.com/
William Slawski muses on the inner workings of search engines, probes related patents and passes on other news of interest to webmasters.
SEO-cools world http://coolslko.blogspot.com
Blog about Search engine optimization tips, tools links, Link building strategy tips, internet marketing, search engine news updates, Pay Per Click, google adwords, adsense, web
analytics, Tips on optimizing for Google and other webmaster concerns. And lots more...
SEOBuzzbox http://www.seobuzzbox.com/
Aaron Pratt posts SEO news and interviews with well-known figures in the world of search engine development and marketing.
