Got an iPhone or 3G iPad? Apple is recording your moves

 A hidden file in iOS 4 is regularly recording the position of devices.
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. Ever since iOS 4 arrived, your device has been storing a long list of locations and time stamps. We're not sure why Apple is gathering this data, but it's clearly intentional, as the database is being restored across backups, and even device migrations.

A visualization of iPhone location data. Click to enlarge.

The presence of this data on your iPhone, your iPad, and your backups has security and privacy implications. We've contacted Apple's Product Security team, but we haven't heard back.
What makes this issue worse is that the file is unencrypted and unprotected, and it's on any machine you've synched with your iOS device. It can also be easily accessed on the device itself if it falls into the wrong hands. Anybody with access to this file knows where you've been over the last year, since iOS 4 was released.