Search Engine Ranking Factors
Rand does a bang up job listing a very nice set of SEO variables and their relative importance. It's always nice to review lists like this to refresh the back of your mind on all those important factors. Gives some nice insight as to what a lot of the quality indicators that Andy had recently mentioned might be.
This article contains a large list of the factors that can influence a web document's rank at the major search engines (Yahoo!, MSN, Google & AskJeeves) for a particular term or phrase. Although it is impossible to say for certain which of these items affects which search engine or how important the factors are individually, I've created an estimated ranking importance scale...
Nice job Rand. Great stuff.