Justin Kirby, MD of Digital Media Communications Ltd (DMC) based in London and Sydney Justin started his career in the mid-80s working on ground-breaking multimedia installation projects, including the famous Herbie Hancock video robotics models. In 1994 Justin founded DMC, the experts in planning, seeding and tracking online viral and buzz marketing campaigns for major brands, including Diesel, EA Sports, Eidos, Levi's, Mates, Mazda, MTV, Sony Ericsson, Ubi Soft, Virgin and Xbox. Dr Paul Marsden is a consultant social psychologist for the London School of Economics, specialising in the dynamics of fashions and fads. With a PhD in social contagion and a background in marketing, his expertise is in generating and managing positive word of mouth for new products.