From Silicon Republic:

"War driving — the refined art of finding and using unsecured private wireless local area networks (WLANs) – will be rife across Dublin City this weekend as part of a high-tech treasure hunt competition.

"Entitled WaveHunt, the competition is the Irish adaption of US hacker society DefCon’s RunningMan competition and is being organised by RedBrick, Dublin City University’s student networking society. RedBrick is one of the largest student networking society in Ireland, boasting some 1,000 members.

"The aim of the competition, which takes place this Saturday in Dublin City, is to test individuals’ network and direction-finding skills and win some money in the process..."

Cool!  WaveHunt sounds like a lot of fun, and a great way to raise awareness around wireless LAN security issues.
(Note to self: make sure the home WLAN is secure before Saturday!)