http://www.seobook.com/learn-seo/is-pagerank-important.php
Does PageRank matter? When I first got in SEO it was crucially important, but over the years other pieces of the relevancy algorithms (like domain age, domain name, domain trust, domain extension, link anchor text, searcher location, search query chains, word relationships, search personalization, other user data, result re-ranking based on local inter-connectivity, input from 10,000+ remote quality raters, and even a wide array of penalties & filters) have been layered over the top of the core relevancy algorithm.
