Good for SEO Knowledge: @mattcutts, @dannysullivan, SEObook.com, searchengineland.com Good for Social Media: @mashable, @readwriteweb, @jowyang, @adamostrow, @

Good for SEO Knowledge: @mattcutts, @dannysullivan, SEObook.com, searchengineland.com Good for Social Media: @mashable, @readwriteweb, @jowyang, @adamostrow, @tamar, http://www.chrisbrogan.com http://www.chrisbrogan.com Overall marketing: @adage Software marketing: @asmartbear PR: @haro, @joshdilworth, @skydiver, @briansolis I hope this is a good starting point for you. :D