Search Engine Watch

http://searchenginewatch.com/. Their 'about' page:
About Search Engine Watch provides tips and information about searching the web, analysis of the search engine industry and help to site owners trying to improve their ability to be found in search engines. The site was created by Danny Sullivan, an Internet consultant and journalist who continues to maintain the site for internet.com. He is assisted by associate editor Chris Sherman.

While the site might be of major use to webmasters, it has a lot of info about searching the web.

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