The Child, which features a version of New York made of words. Very cool. (Hat tip to fade theory.) [20.11.11 The second video has been removed from YouTube by its author so there isn't anything to link to any more.]
Matthew Stibbe is CEO of Articulate and Turbine. Before that, he ran a computer games company for ten years, worked as a freelance journalist. He has a commercial pilots licence and a degree in modern history.