This may be old news in the SEO world but it offers some interesting reading for people who want to understand how the Goolge technology works. On the 31st March 2005 Google filed for a patent ( pantent number 20050071741 ) which may or may not provide you with an overview to the workings of Google. Some of you may already know this but for others it act's as useful reading in terms of understanding Google.

Click here to read more about the Google Patent