O’Reilly Radar: Got an iPhone or 3G iPad? Apple is recording your moves
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"Today at Where 2.0 Pete Warden and I will announce the discovery that your iPhone, and your 3G iPad, is regularly recording the position of your device into a hidden file. ... All iPhones appear to log your location to a file called "consolidated.db." This contains latitude-longitude coordinates along with a timestamp. ... All iPhones appear to log your location to a file called "consolidated.db." This contains latitude-longitude coordinates along with a timestamp."