I recently read this awesome article by Ian Lurie on the Portent blog: http://www.portent.com/blog/analytics/seo-analytics-middle-earth-style.htm However, I keep getting stumped by what he means under the "Grade Yourself" section by "keyword diversity." Of course, I've tried to ask him, but he hasn't yet responded. Besides, I like to get the opinion of the SEOMoz crowd anyway. So what is "keyword diversity"? Is it the total number different link texts out there linking to my site? The total number of keywords I'm actively tracking and optimizing for? The total number of phrases for which I rank in a Google search engine (if it's even possible to know that)? Thanks, Benjamin