An anonymous reader writes "Bad news: a Canadian who visited New York had his laptop stolen. Good news: it was outfitted with Prey, the open-source computer tracking application. Better news: a group in NYC made a 'geek squad intervention,' faced the culprit and retrieved the laptop safely. This case naturally raises the usual sorts of questions about the 'Twitter posse' culture."
The victim-turned-victor is author and consultant Sean Power.