IPhones and 3G iPads log your location in an unencrypted file on the device
I didn't know this was news. I and other security researchers & law enforcement have known about it for a while. I assisted in one court case where the data was used as evidence.<p>I suspect the slick-looking iPhoneTracker app finally made it interesting to the media.<p>Edit: There was a similar deal on iOS 3 but it seemed more like a bug, not a feature. Data would be purged at some unpredictable interval. I can't recall the file path and don't have an iOS 3 device handy.