SEOmoz
SEOmoz develops SEO software, provides a robust link intelligence API, and hosts the web’s most vibrant SEO community. They are based in Seattle, but are often found traveling the globe to participate in marketing events and meetups.
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SEO Roundtable
The purpose behind the Search Engine Roundtable is to report on the most interesting threads taking place at the SEM forums. By enlisting some of the most recognized names at those forums, the Roundtable is able to not only report on these outstanding threads but also provide a synopsis that provides greater detail into those threads.
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Search Engine Land
Search Engine Land is a news and information site covering search engine marketing, searching issues and the search engine industry. The site is led by journalist Danny Sullivan, who has been covering search for the past 11 years.
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SEO by the Sea
The SEO by the Sea blog keeps an eye on information directly from the search engines such as patent filings and whitepapers, to share some of the assumptions and processes behind how search engines work, how they rank web pages, and whether or not they might have some surprises for us in the future.
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Search Engine Journal
Search Engine Journal, established in 2003, is a 7 year old publication of Alpha Brand Media, which specializes in a community approach to the reporting of search engine news & the sharing of Search Engine Marketing knowledge & tactics.
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SEO Book
SEO Book offers the #1 SEO training program. It comes with tools, videos, a private member’s forum, and is run by one of the most well respected SEOs in the industry, Aaron Wall.
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Techcrunch
TechCrunch is a leading technology media property founded in 2005, dedicated to obsessively profiling startups, reviewing new Internet products, and breaking tech news.
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Mashable
Founded in 2005, Mashable is the top source for news in social and digital media, technology and web culture. Mashable is the most prolific news site reporting breaking web news, providing analysis of trends, reviewing new websites and services, and offering social media resources and guides.
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Social Media Today
Social Media Today is an independent, online community for professionals in PR, marketing, advertising, or any other discipline where a thorough understanding of social media is mission-critical. Every day, they provide insight and host lively debates about the tools, platforms, companies and personalities that are revolutionizing the way we consume information.
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Read Write Web
ReadWriteWeb, founded on April 20, 2003, by Richard MacManus, is one of the most popular technology blogs in the world, known for offering insightful analysis about each day’s Internet industry news.
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Search Engine Watch
SEW provides tips and information about searching the web, analysis of the search engine industry and help to site owners trying to improve their ability to be found in search engines through SEO, SEM, and Social Media.
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Bill is the Lead Linchpin at the company and focuses on SEO and content strategy. Bill’s ten-year background in digital marketing, SEO, and building online companies has helped him rise to strategic lead for some of the largest online brands and content websites in the world. Bill believes that at the core of a website's success sits the value that website provides it users.
Click here to learn more about LinchpinSEO's Lead Linchpin.
I use Seomoz all the time to do analysis on my site.