SEO Resources 
Introduction
There are many experts, websites and communities out on the Internet to help you understand everything involved in Search Engine Optimisation. Newsletters, forums, articles and industry representatives are a great source of information to keep on top of the latest developments and techniques in the SEO world. The links below are to particularly good and useful sites we take the time to read and participate in.
Geek Tools Whois
Quick and useful tool to lookup the site details for any top level domain name.
Matt Cutts
Google Search Engineer's blog. Matt's responsibility at Google is to develop solutions to deal with Search Engine spam. The blog is light hearted and often features details of current events with the Google Search Engine.
SEO Chat
Search news, articles, marketing help, tools and tips with a forum to boot.
SEO Consultants Server Header Tool
A great tool to check your server response headings for a particular page or site, especially when testing your 301 Permanent redirect... You can also use it to find other sites hijacking yours. There is loads of information there so check the whole site out, especially their tools.
W3Schools
Coding lessons, help and an all-round great site for any developer.
Webmasterworld
Run by Search Guru Brett Tabke, Webmasterworld is a forum community dealing with everything Internet. Servers, Code, Marketing, Search Engines, Google, Yahoo and MSN Seach News and a whole lot more with friendly forum participants willing to lend a hand.
Web Pro News
We like Web Pro News for their newsletters sent every week with the latest happenings in the Search world. Good stuff.
Regular visits to the sites above and newsletters received from them will help you with your SEO campaign.
Enjoy!