GoogleBlog:

At Google, we’re constantly trying to find new ways to organize the world’s information, including information relevant to our business.We set up a predictive market system inside the company.The markets were designed to forecast product launch dates, new office openings, and many other things of strategic importance to Google. So far, more than a thousand Googlers have bid on 146 events in 43 different subject areas (no payment is required to play).