To me Bruce Sterling is one of the most inspiring speakers around. In September, 2007 his latest book will be released called Ascendancies - The Best of Bruce Sterling. I pre-ordered it. Here you can watch his presentation and powerful vision during the LIFT Conference on different important emergent trends like GeoWeb, RFID, Augmented Reality, mobile search, mobile social networks, Internet of Things and sustainability.
Highly recommended as this is in my view one of his best presentations I have seen so far.