'Herds' of wary cars could keep an eye out for thieves / New Scientist, 5 June 2008
http://technology.newscientist.com/channel/tech/dn14067-herds-of-wary-cars-could-keep-an-eye-out-for-thieves.html?feedId=online-news_rss20
David Robson
"The security system relies on networks of cars constantly gossiping with their neighbours using concealed wireless transmitters. The cars raise the alarm when a thief tries to make a getaway with any of their number."