http://www.search-this.com/google/google_pagerank_explained.asp
other interesting articles, same site:
-Why Flash Will Never Die
http://www.search-this.com/website_design/why_flash_will_never_die_1.asp
-Search engine decoder: who provides what to whom/ who owns what…?!
http://www.search-this.com/search_engine_decoder.asp
-12 Steps To A Better Website
http://www.search-this.com/website_promotion/12_steps_to_a_better_website.asp
and others…