For background on the M20, visit blog.marketer20.com.  This is a list of marketing blogs written by client-side marketers.

• Andy Lark's Blog :: Andy Lark, Dell
• AttentionMax :: Max Kalehoff, Clickable
• Bad idea, indeed :: Philippe Deltenre, Microsoft 
• BeRelevant! :: Tamara Gielen, eBay 
• Biznology :: Mike Moran, IBM 
• Brandopia :: Geert Desager, Microsoft 
• Buzz Marketing For Technology :: Paul Dunay, BearingPoint 
• The Changing Face of Media :: Scott Berg, HP 
• Churbuck.com :: David Churbuck, Lenovo 
• The Client Side :: Michael Seaton, ScotiaBank
• Community Group Therapy :: Sean O'Driscoll, Microsoft 
• Consumer Generated Media :: Pete Blackshaw, Nielsen Buzzmetrics 
• Conversation Agent :: Valeria Maltoni, SunGard Availability Services 
• Cross The Breeze :: Kris Hoet, Microsoft 
• Decker Marketing :: Sam Decker, Bazaarvoice 
• The Digital Mindset Blog :: Eric Kintz, HP 
• El Blog de Enrique Burgos :: Enrique Burgos, SEUR
• Emerson Process Experts :: Jim Cahill, Emerson Process Management 
• ExperienceCurve :: Karl Long, Nokia 
• Flooring The Consumer  :: CB Whittemore, Wear-Dated Carpet Fiber 
• Gauravonomics :: Gaurav Mishra, Tata Motors
• The HP LaserJet Blog :: Vince Ferraro, HP 
• HP's Small & Medium Business Community Blog :: Anneliese Olson, HP 
• The Innovative Marketer :: Steve Gershik, Eloqua 
• The Kristasphere :: Krista Summit, Lenovo 
• Listen Up! :: John Porcaro, Microsoft 
• The Lonely Marketer :: Patrick Schaber, Transition Networks 
• Marketing Monster :: Michael Morton, Lampo Group 
• Marketing Nirvana :: Mario Sundar, LinkedIn 
• Masiguy :: Tim Jackson, Masi Bicycles 
• MEGO :: Michelle Kostya, Cuisinart and Waring Pro
• Novell:  John Dragoon's Blog :: John Dragoon, Novell 
• Randy's Journal :: Randy Tinseth, Boeing 
• Sony Electronics Blog :: Rick Clancy, Sony Electronics 
• Strategic Public Relations :: Kevin Dugan, FRCH Design 
• Suzanne's Blog :: Suzanne Fanning, Fiskars
• Todd And - The Power To Connect :: Todd Andrlik, Leopardo Construction 
• "Turbo" Todd Watson :: Todd Watson, IBM 
• Unleashed on marketing blog :: Gary Bembridge, Johnson & Johnson