H

• Hamlet Batista dot Com - This SEO blog promises a focus on the more advanced search engine optimization tactics drawn from personal experience with SEO consulting as well as affiliate marketing.
• High Rankings Advisor Archives - SEO legend Jill Whalen’s newsletter available via RSS.
• HitTail - Mike Levin blogs about Connors Communication’s tool HitTail.
• Hitwise Intelligence - The HitWise team posts tasty insights about search trends.
• Hybrid SEM Blog - Joe Whyte writes about old school and new school SEO.

I

• ibrian - Brian Turner’s business blog. He also writes for SEOmoz (until Rebecca comments that he doesn’t anymore) and Threadwatch.
• I Hate Google.org - Dan Kramer writes about sSearch engine optimization news and tidbits.
• I Love Jack Daniels - Dave Child offers a nice mix of design, development, cheats and marketing.
• IncrediBILL’s Random Rants - Bill Atchison on, “Stopping scrapers and spammers and a whole lot more”.
• Influential Interactive Marketing - Rohit Bhargava, VP Interactive Marketing for Ogilvy Public Relations on marketing online.
• In Search of Stuff - Humorous look at the search marketing industry by Scottie Claiborne and Michael Motherwell.
• Inside AdSense - Official blog for Google AdSense.
• Inside AdWords - Official blog for Google AdWords.
• Inside the Marketers Studio - David Berkowitz’s blog on internet marketing.
• InsideGoogle - Nathan Weinberg’s long time blog about Google and the search industry.
• Internet Marketing Blog - Chris Garrett of Performancing fame.
• Internet Marketing Monitor - A paid staff of writers at IMM pull internet marketing industry stories of the day as well as case studies and add commentary.
• Internet News - A general internet marketing and search news blog by Gwen Harris.
• IR Thoughts - Dr E. Garcia offers an array of posts covering news, papers, and theses on information retrieval, data mining, and search engine technology with a penchant for dispelling myths about Latent Semantic Indexing promoted by sinister SEOs.
• Irish Wonder’s Black Hat SEO Blog - A blog about blackhat, general SEO issues and other things related to the life on the web.

J

• Jaan’s Search Marketing Blog - Jaan Kanellis, aka “IncredibleHelp”, blogs mostly about SEO with a few rants about the industry here and there.
• Jeremy Zawodny’s blog - Famous or infamous? Yahoo employee.
• Jim Boykin Internet Marketing Blog - Jim Boykin’s excellent blog about SEO, link building and running a SEO firm.
• JLH Design Blog - Fellow Minnesotan John Honeck really wants you to buy him a beer and along the way, this designer blogs advice about search optimization with an emphasis on all things Google.
• Joe’s Sem Blog - Joe Williams from the UK writes mostly about PPC search marketing.
• Joe Whyte - Joe writes about everything from PPC to SEO to social media to industry news.
• John Battelle’s Searchblog - Famous co-founder of Wired magazine posts about the search engine industry.
• John Scott’s Internet Marketing Blog - V7N founder posts on SEO.
• johnon.com - John Andrews on competitive webmastering and SEO.
• Jonathan Mendez’s Blog - Branding, usability, paid search and analytics.
• Joost de Valk - Joost de Valk blogs about web design and SEO from the Netherlands.
• Joseph Morin - Travels - Joe consults, works with Pubcon and should post more often.
• Justilien - Link building guru posts about - link building!
• Jason-seo - Link building and articles

K

• Karl Ribas - Blogs mostly about search engine news, pay per click and tools.
• KoMarketing Associates SEM Blog - A group/company blog covering SEO, PPC, events, industry news/trends, tips and a lot of personal insight. These folks are clearly involved in, and have an opinion on, what goes on in the industry.

L

• Lee Dodd - Lee Dodd of Elite Retreat and Earner’s Forums blogs about forum marketing and SEO.
• Lies, Damed Lies - Microsoft’s Ian Thomas, who leads Microsoft’s new web analytics solution effort, blogs about online marketing and web analytics.
• LifeDev - Glen Stansberry blogs about personal productivity, web 2.0 and social media.
• Link Building Blog - Patrick Gavin and Andy Hagans of Text Link Ads post about link marketing.
• LinkJuicy - This new blog from Peter DaVanzo of SearchEngineBlog.com fame, promises to deliver all things related to link building and includes a recent interview with Ralph Tegtmeier, aka Fantomaster.
• LocalMN Blog - Paul Jahn writes about local search marketing from Minnesota.
• LogicWerks - Vural Cifci kinda sorta writes this blog about industry news. I have to say, it barely made this list because of all the ads and overabundance of links posts.
• Lonely Marketer - Patrick Schaber’s blog about being an in-house search marketing manager.