The Top SEO Blogs:

Blog: SEOmoz
URL: http://www.seomoz.org/blog.php
Description: News, tips and highlights from the search marketing industry.

Blog: William Slawski
URL: http://www.seobythesea.com/
Description: Offers great search engine optimization advice and tips.

 Blog: SEO chat
URL: http://www.seochat.com/
Description: Great blog with well researched posts. Part of a larger site with an excellent forum and free SEO tools.

Blog: Aaron Wall’s SEO Book
URL: http://www.seobook.com/
Description: Leading SEO blog by Aaron Wall covering the search space. It offers marketing tips, search analysis, and whatever random rants come to mind.

Blog: Matt Cutts
URL: http://www.mattcutts.com/blog/type/googleseo/
Description: Matt Cutts works for Google and is responsible for search engine quality (i.e. getting rid of spam) and for helping web masters with good SEO practices. This one is a must for anyone that wants to master good, solid, SEO practices.

 Blog: Searchenginewatch.com Blog
URL: http://blog.searchenginewatch.com/blog/
Description: Blog founded by Danny Sullivan, internet consultant and journalist. It offers many search engines resources and SEO related news.
Free newsletter.

 Blog: Jill Whalen
URL: http://www.highrankings.com/
Description: While they do not maintain a blog, they have an excellent newsletter and lots of great seo articles.
  Blog: Nadir Garouche
URL: http://www.seoprinciple.com/
Description: A blog covering Search Engine Optimization
techniques, news, commentary and much more.

Noteworthy

 Blog: Stuntdubl
URL: http://www.stuntdubl.com/
Description: Todd is a certified AdWords Professional and SEO
consultant. He maintains a very solid blog where he shares his
latest thoughts and insights on SEO. Well worth reading.

Launching soon:

 Blog: Search Engine Land
URL: http://searchengineland.com/
Description: Everyone is waiting for this blog to launch. It will cover the latest news on search engine marketing and promises to be the single most resourceful tool on search engine marketing.

Free SEO Tools

 Blog: SEO company
URL: http://www.seocompany.ca/tool/seo-tools.html
Description: In this blog you will find 156 SEO tools that will help you to optimize your website and move your search engine position higher.
Blog: The webconfs.com SEO toolset
URL: http://www.webconfs.com/
Description: You will find SEO Tools, Articles and Forums. Try also to do the quiz on SEO practices.

Also here is another list:

1. Seo Book
   

   Seo Book is the blog site for getting the latest trends and changes in the search engine Algorithms. They just keep on providing you valuable seo tips and if you want to know more about seo, they have a seo book for sale.

   
   


2. Beanstalk's Seo blog
   

   another seo news blog for getting more information about the search engine industry and for making quality decisions for your website or business

   
   


3. Seo and PPC blog
   

   to know more about search engine optimization and PPC advertising