Well, it's like every paranoiac warned us, we are being tracked unawares, especially if you own an iPhone or an iPad.
Two British researchers have uncovered a hidden feature in iPhones and iPads that surreptitiously records its owner's location. Such location data is available from every phone, of course. By using cell tower coordinates, triangulation and time one can geolocate anyone who makes or receives a call.
Read the full story from: http://www.royalgazette.com/article/20110427/COLUMN06/704279999/-1/business02