Interesting search engines releases:
the Google Patent on historical data was released now… actually containing content from back December 2003 (where a big Google Update "Florida" shocked thousands of webmasters… probably the first implementation of several of these points…)
This US Google Patent describes a dozen methods for analyzing, scoring and ranking a number of web documents related to their domain names, inbound links, outbound links, content changes or staleness, the age of all of that and so forth…
Some interesting comments, analysis and discussions on that:
Great patent summary by SEOMOZ
Google War on SEO – see's a confirm of Google fighting search engine spammers with their algo changes
Practical Consequences – a bit simplified and maybe more for the rookie web master
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