Apple's current iOS has a feature that can help owners find lost iPhones and iPads. The app is called Find My Phone.
NY Times tech columnist David Pogue lost his iPhone on a train ride from Washington DC to NYC. (It was probably stolen). David's search for the phone went viral on Twitter, and after 5 days, the phone was recovered by local police in a town in Maryland.
Read the story here http://pogue.blogs.nytimes.com/2012/...d-pogues-phone
More here http://gizmodo.com/5931258/david-pog...ost-his-iphone