WiFi enthusiasts from all over the world -- and from my experience quite a few others who escape precise defintion -- will gather in Las Vegas July 29-31 for the Third Annual Defcon Wifi Shootout Contest, in which nerdy types from all walks of life compete to see who would break the record of how far a WiFi signal can travel. The goal is to see who can achieve the greatest possible connect distance between two 802.11b/g stations through innovative engineering and antenna design. Website