• Aaron Shear on SEO - This pedigreed SEO with a history at Inktomi, SEO Inc and now shopping.com blogs about search marketing.
• About: Web Search - Wendy Boswell covers the search engines for About.com.
• Accessible Web Design - Joe Dolson on accessibiliy.
• adCenter Blog - The official blog of Microsoft adCenter.
• AdGeek - Direct response copywriter Jeff Horsager offers a nice mix of marketing, optimization, email marketing and social media with an eye towards metrics and analytics. “If it can be measured, it can be improved.”
• ad:tech blog - Official blog for the ad:tech conferences.
• agerhart - Andrew Gerhart, the Director of SEO for Primedia Automotive, writes about in-house SEO issues, optimization, web 2.0 topics and search engine news.
• aimClear Search Marketing Blog - Another Minnesota based blogger makes the list with Marty Weintraub blogging about paid search marketing and organic SEO with the purpose of demystifying common topics that come up in his interactions with clients.
• Alibi Productions Blog - Drew Stauffer’s blog about marketing online.
• Alister Cameron - Blog consultant, web designer and father of four blogs about blogging and search marketing.
• Altogether Digital - A group blog from the team at London based search marketing agency Altogether, which is a result of the merging of eyefall, DC Interact & Meme, blogs about SEO, PPC and affiliate marketing.
• Andy Beard - Lives in Poland, runs his business from the UK and blogs about the search industry, blogging, niche and affiliate marketing.
• AOL Search Blog - The official search blog for AOL.
• Apogee Weblog - Richard Ball of Apogee Web Consulting blogs about search engine marketing, small business growth, web analytics and pixel advertising.
• Ask.com Blog - Official blog for Ask.com
• Ask Kalena - Kalena Jordan offers search engine tips and advice.

• Baron VC - Sam Baron writes about social media.
• Beanstalk SEO Blog - Dave Davies blogs about news in the search engine and online marketing industry.
• Beginning SEO Podcast - David Brown and Brian Mark do a podcast talking about the fundamentals of search engine optimization.
• Beyond the Paid - Melissa Mackey who is a Search Marketing Director for MagazineLine and recent winner of a free pass to Search Marketing Expo blogs about search engine marketing.
• BIG marketing for small business - Rajan Sodhi’s fairly new blog on common and uncommon marketing tactics for small businesses.
• biggNuts - Dax Herrerra, black hat SEO and book author.
• Big OAK SEO blog - Shell Harris blogs about all angels of SEO.
• Bill Hartzer - Bill has redone his site and blogs about a wide variety of topics ranging from the search marketing industry to linking to monetizing web site content.
• Biznology - IBM Distinguished Engineer Mike Moran’s blog on search.
• Blizzard Internet Marketing - Group blog and newsletter from the team at Blizzard Internet Marketing.
• Blogation - David Z. Hawk provides unique tips on Google AdWords, Yahoo Search Marketing and affiliate marketing.
• BloggerDesign - Thomas McMahon’s blog (aka TwisterMC) on blog design, usability and marketing.
• Blogs and Feeds - Amanda Watlington’s blog on blogging, RSS and search marketing.
• Blue Hat SEO - Eli writes about advanced SEO tactics.
• BoogyBonBon - Levi, founder of WordZe blogs about making money online and the MyGen simple site generator.
• BPWrap - Barry Welford’s blog about internet marketing.
• Brad Fallon - Long time SEO.
• Brandon Hopkins - Made a big hit with a link building post which hit the home page on Digg.
• Brian White - Googler on the search spam team blogs personal interests, but mostly Google. Think the Google spam team doesn’t know about the latest paid link schemes? Guess again.
• Britopian - Michael Brito, formerly with HP and now with Yahoo, writes about social media and marketing online.
• Bruce Clay Blog - Lisa Barone performs her blog magic covering the search marketing industry.
• BUMPzee SEO/SEM Community - An interesting community that aggregates the blog RSS feeds of it’s members. In a way, this acts like an aggregator or RSS mashup.
• Business Blog Consulting - A group blog started by Rick Bruner.
• business2blog: B2Day - The latest ideas from Business 2.0 editor Erick Schonfeld

C

• Cameron Olthuis - Personal blog with some search and SMO/SMM thrown in.
• Cape Cod SEO - Small business SEO and PPC plus a little about Cape Cod from Derek J Edmond.
• Capture the Conversation - Internet Marketing Methodologies from Room 214, Inc co-founders James Clark & Jason Cormier.
• Cartoon Barry - Barry Schwartz’s pseudo personal blog. Also includes links to posts from his work at Search Engine Roundtable and Search Engine Land.
• Catalyst Search Marketing Blog - Heather Frahm, President of Catalystonline, writes about issues related to healthcare and pharma search marketing.
• Catherine “Cat” Seda - Long, long time, search marketer!
• Charlene Li’s Blog - Forrester Analyst blog that also covers search marketing.
• Clix Marketing Blog - PPC Expert David Szetela has lots of speaking gigs. I just wish he’d post more often on industry news and tips on paid search advertising.
• ClearSaleing Blog - I came upon this search marketing agency blog indirectly and found it to be chock full of great posts with practical advice and clear insight from people who know what they’re talking about without all the pomp and circumstance you see on the prima donna SEO blogs. Well done!
• Comparison Engines - Brian Smith’s popular blog on comparison shopping engines.
• Commerce360 Blog - Craig Danuloff posts about search marketing and analytics.
• Compete Blog - Online trends and insightful findings from the team at Compete.com.
• comScore Networks - Feed for comScore press releases.
• ContextWeb Internet Advertising Blog - John Ebbert writes about online and contextual advertising with info for publishers and advertisers.
• Conversion Rater - Pat McCarthy shows you how to make the web convert for your goals.
• Convertup - Brian Thibault, aka Bonez / TBO, blogs about usability, search engine rankings and general website marketing strategy.
• Copyblogger - Brian Clark’s most excellent blog on copywriting and marketing.
• Cornwall SEO blog - Lyndon Antcliff’s SEO & social media blog.
• Cre8pc - The lovely and super smart Kim Krause’s blog on usability and holistic search marketing.
• Cre8tive Flow - Cre8asiteforums group blog.
• Create Business Growth - Christine O’Kelly writes about blogging, copywriting and small business marketing online.
• CrunchNotes - Michael Arrington’s less formal blog as a companion to Techcrunch.
• Cshel SEO and PR - Carolyn Shelby, who helps Neil and Cameron on their podcast, Rush Hour, writes about online marketing for small businesses.