Place Matters: Social Encounters between the Physical and DigitalOver 15 years ago, Mark Weiser presented a vision of ubiquitous computing, of computers that would disappear into walls (and everywhere else). In this talk Elizabeth Churchill of Yahoo! Research describes research that is concerned with punching holes in the walls between online and offline social encounters. I pose the questions: How can the two be more effectively merged? What technologies will emerge in the next ten years to help us do that? From O'Reilly Emerging Technology Conference, San Diego, CA, March 4, 2008. Less