Chad Hurley, co-founder and CEO of YouTube, attends the session 'The Impact of Web 2.0 and Emerging Social Network Models' at the World Economic Forum (WEF) in Davos January 27, 2007. Top politicians, monetary policymakers, senior business executives and non-governmental organizations (NGOs) hold their annual meeting, the WEF, in the Alpine resort of Davos, Switzerland, until Sunday. REUTERS/Pascal Lauener (SWITZERLAND)