Apple late last week applied for a patent labeled "systems and methods for identifying unauthorized users of an electronic device," which may allow them to remotely disable jailbroken an iPad or iPhone for "unauthorized use," or to instead simply catch the thieves that stole an iPhone. The patent point out that many different methods could be used for identification of Jailbroken devices, including recording voice, detecting heartbeats of users, taking photos of surroundings, grabbing the GPS co-ordinates, hacking attempt detection and more.
It also covers sending a notification to a service such as Facebook, email, or a "cloud service" (which we would assume is MobileMe) to notify the user of suspicious behavior, and outlines that when unauthorized use is detected, "functions of the electronic device can be restricted." These functions include contacts, calendars, browsers, all applications, the ability to erase data and store it until the user is identified.
Refrence: Apple Patent