James Norquay recently published an interview with an ex-googler, a member of Matt Cutts’ web spam team famous in the SEO community – Andre Weyher.
You can read the whole interview here, but I think the most revealing thing that can be taken from this interview is one thing Andre said:
(…)getting a link from a high PR page used to always be valuable, today it’s more the relevance of the site’s theme in regards to yours, relevance is the new PR.
Andre also mentioned how link building significantly changed and that you shouldn’t use techniques that were mainstream just 8 months ago. Read the entire interview, you’ll find a few more gems of knowledge in there!