iPhone knows where you’ve been…

As probably everyone with a twitter account knows (from probably at least two of the people you follow), it has been discovered that the iPhone tracks and logs all locations it has been to. The map shown by the first person to write about this story shows dots over the map, but I would have thought they would be lines  unless the iPhone jumped from one location to another. Anyway, apparently it applies to devices running iOS 4 that have GPS of some sort in it, so that means the iPhone and the 3G iPad. All the data seems to just be stored on the phone and on backups, but this is still rather worrying.