C. Li. Mcgraw-Hill Professional, (2008)Charlene Li works for Forrester Research, a company well-known for its research on social media. "Web-Strategist" Jeremiah Owyang whose blog is among the top50 ad-blogs world-wide (http://www.web-strategist.com/blog) also works there as an analyst. I heartily recommend his blog if you're interested in social media and its impact on the business world..