Over at Green Leads, Mike Damphousse has built a magnificent marketkeeping system. Although his business is focused on business-to-business lead generation, his comments are true for any audience—all people are hungry for news. (It's called the 'awareness instinct.')
Marketing & Strategy Innovation Blog: Demand Generation and Social Media, 2009-Aug-8, Interview by Jon Miller:
Executives are information sponges. They want nuggets of data and knowledge that will help them do their jobs.... If they downloaded a whitepaper or clicked through a newsletter, it doesn't mean they are ready to buy. It means they are thinking of you and they will most likely be more receptive to additional touches.