Dom Deltorto lives in London. In early February, he says, someone broke into his flat and made off with his MacBook Pro and his iPad.
Deltorto was prepared for just such an incident. He had installed Hidden App on his laptop, a program that tracks the laptop's location and sends back images of the thief. However, Hidden App still needs to be connected to the Internet to work. After more than a month of radio silence, Deltorto reports that his MacBook suddenly came online, but it wasn't in a place where he could just call the London police and have them recover it.
http://news.cnet.com/8301-17938_105-57579119-1/man-traces-stolen-laptop-to-iran-blogs-photos-of-new-owners/