Discoverd Knol and some great SEO articles

A large list of SEO tools:
http://knol.google.com/k/moose/seo-knol-group/56p4t4e0ve75/2#

Aaron Wall's knol article. A wonderful explanation of what to think through in SEO.
http://knol.google.com/k/aaron-wall/seo-basics/38v8wakla8f98/2#