Creative Commons is a non-profit corporation that deals with copyright and licensing issues regarding use of creative works by the public. http://creativecommons.org/
The Open Source Initiative is a development and standards body involved in software that is low cost or free to the public. www.opensource.org/
SEO Theory and Analysis Blog. Just what it says on the tin. www.seo-theory.com/
An Event Apart is a conference sponsored by the creators of A List Apart which focuses on standards-based web design. www.aneventapart.com/
Seomoz Whiteboard Friday videos presented on Vimeo. Tips for designers on better SEO. http://vimeo.com/user409469
Google guru Matt Cutts. He's head of their Webspam team. www.mattcutts.com/blog/
Bing is Microsoft's new search engine. www.bing.com/
Search Engine Land is a news and information site covering search engine marketing, searching issues and the search engine industry. http://searchengineland.com/
Google AdSense is a free program that enables website publishers of all sizes to display relevant Google ads and earn. www.google.com/adsense/login/en_US/