Google VP of Search Products and User Experience Marissa Mayer discusses being reactive vs being innovative, and ROI on Google's "20 percent time".Closing Keynote: Is the Ethos of the Social Media World Changing How We Conduct Business Online and Offline? Lisa Stone moderates this discussion about whether corporate leaders are seeing and leveraging more ideas generated from the outside in and from the bottom up as they lead their household brands into the future. Lisa is joined by iVillage President, Debi Fine, Google VP of Search Products and User Experience Marissa Mayer, Redbook Magazine editor-in-chief Stacy Morrison and WashingtonPost.Newsweek Interactive CEO Caroline Little for the discussion. videobloggingweek2007 Less