Internet Retailer
Industry strategies for online merchants. Provides daily news, articles and research.
http://www.internetretailer.com/default.asp

Clickz
Includes columns with commentary and analysis on a wide variety of internet marketing subjects ranging from B2B marketing to search engine marketing.
http://www.clickz.com/

MarketingProfs.com
Marketing knowhow from professionals. Newsletter, articles and how-to's.
http://www.marketingprofs.com/

avant|marketer
A source for internet advertising strategy, insight and news. Features interviews with Internet Advertising industry insiders.
http://www.avantmarketer.com

SitePoint
A resource site for Webmasters, focusing on web site design, promotion, submission, positioning, marketing and profitability. Articles by noted Web professionals.
http://www.sitepoint.com

MarketingSherpa.com
Practical news, case studies and tips for Internet marketing.
http://www.marketingsherpa.com

Search Engine Watch
Guide to search engine registration and ranking issues, providing current news and analysis.
http://searchenginewatch.com/

Internet Advertising Report
The latest internet advertising news and trends.
http://www.internetnews.com/IAR/

Search Engine Guide
Daily news about search engines and the search engine industry, and information on using search engines to market your web site
http://www.searchengineguide.com/

the Bivings report
Publication dedicated to issues regarding the online marketing, promotion, and advertising business. It offers daily news dispatches and monthly articles.
http://www.bivingsreport.com

Opt-in News
Permission marketing news, views and analysis.
http://www.optinnews.com/

Paidcontent.org
A news/resource site covering all types of paid content business models, subscription-enabling technologies and corporate initiatives in gaining subscription revenues through content. In effect, covering all sorts of digital content for which end consumers or institutions pay.
http://www.paidcontent.org/

Internet Marketing Newsletter for Small Businesses
Newsletter designed to help small businesses promote their websites online.
http://www.idesignbusiness.com/newsletter.asp

Rick E Bruner's Executive Summary
Frequently updated web log and email newsletter, plus consulting and research, covering Internet marketing and online business strategy. Includes a database of hundreds of e-marketing services providers, as well as an extensive industry resources section.
http://www.executivesummary.com/

BtoB Online
Features B2B marketing news and strategies, with an emphasis on Internet and direct marketing, advertising, analytics, and business publishing.
http://www.btobonline.com/

High Rankings Advisor
Advice and discussion on the latest techniques for search engine optimization.
http://www.highrankings.com/advisor.htm

MediaProfessional.info
Monthly newsletter highlighting emerging trends in media and marketing
http://www.mediaprofessional.info/

iMedia Connection
News and features covering the online marketing sector
http://imediaconnection.com/

Eric Ward's Link Mensch
Information and tips on the art and science of link building, link popularity, and linkability, with reviews of the latest tools and news.
http://www.ericward.com/linkmensch/

Search Engines Info
Features articles on ROI, Paid Inclusion, Paid Payment and search engine marketing.
http://searchenginesinfo.com/

Vin Crosbie's Writings at Clickz.com
A collection of magazine columns about making money from digital content, usually written content.
http://www.clickz.com/experts/author/index.php/60023_all

MarketingVOX
For professionals concerned with internet marketing, strategy and media. Provides a daily commentary and discussion on internet marketing and ecommerce.
http://www.marketingvox.com/