Edinburgh Interactive Festival has announced that Kristian Segerstrale, CEO and Co-founder of Playfish, and industry consultant, Margaret Robertson, are both confirmed to speak at this year's event. Segerstrale and Robertson join the list of guest speakers which includes, among others, Peter Moore, President of EA Sports and Peter Cowley, Managing Director of Digital Media for Endemol UK. Segerstrale will be addressing the audience with a session titled "Lessons from Social Games - or How Today's Social Networks Will Change the Way You Make, Play and Sell Games Tomorrow".