These resources and links will help you learn more about search engine marketing, show you boards for chatting with other SEOs, provide you with many useful tools that you'll need and offers a ton of sites that are packed with the latest news and useful articles.
Google Search Grid - A handy tool that allows you to type in 5 different words and then work out which two-word combination produces the most/least results.
Google Suggest - New tool which shows you search results for keywords.
Search Engine Relationship Chart - Bruce Clay's search engine relationship chart tells you how the different search engine databases feed into the major search sites.
Google Alert - Keep an eye on Google's results automatically.
Google Dance Check - Google has more than one database, you can check them all here.
Spider Hunter - Focuses on search engine spiders, cloaking and other high end web site techniques.
Self Promotion.com - If you want more people to visit your website, you must know how to create search-engine-friendly webpages, and then submit your URL to all the major search engines. That's what this site is all about.