Website Grader seems like a nice, easy interface to an SEO Tool that collects a lot of information and provides a graded score of a website for SEO and even has a rating of the top 20 blogs for SEO.
Recently, I met Nathan Gilliatt in New York; he wrote about Derivatives in media measurement and wrote a pretty interesting and long post on how Website Grader analyzed his own site, The Net-Savvy Executive.
Here's an example of a full Website Grader report for Engadget.
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