BusinessWeek is beta testing a free service called Exchange. It is basically a social bookmarking-type service for business related content. It is free, easy to use and not restricted to BW content. In fact, news, blog and reference content is welcome, as is RSS feeds.
Check out the analytics topic at http://bx.businessweek.com/business-analytics and post links to your favorite articles. Anyone can nominate a new topic area. In fact, I created the business analytics topic. Check it out.