If you are into search engine optimization (SEO), you will probably be interested to know that the second version of the SEOmoz search engine optimization ranking factors has just been released.
The study was conducted with the help of 34 SEO experts across the world and was focused specifically towards Google search results.
I didn't find extreme surprises there, and I am not an expert in the matter at all, but it seems like a good document if you want to know all the factors involved and the (possible) weight of them when ranking in Google.
SO, here is the intro to the document and here is the release itself (if you do not have patience to read the intro first...). Ans while you are there, you may want to download their Beginner's Guide to Search Engine Optimization.