The list of Search Engine Ranking Factors from the seomoz.org blog is now available as a download in MS Word format.
The document is created by several SEO gurus and has a rating for each factor. It is not only useful for people optimising webpages, but it can be helpful to use as a reference for non-web savvy writers in your company.
It is like a section in the style guide for writers for the web.
Great stuff!