Search Engine Optimization Community

SEO forum recommended by Sergey Brin
In case you don't know it, Sergey Brin is one of the two founders of Google.

SEO Newsletter
An excellent free newsletter with over 100,000 subscribers. It is also quite entertaining.
 
SEO News
Subscribe to receive daily or weekly SEO news. Good way to stay tuned to the SEO world.
 
SEO Articles
One of the largest collection of SEO resources on the Internet.