"Apple's iPhone 3G, iPhone 3GS, the iPhone 4, and iPad models are keeping track of consumers whereabouts"
I found this via Hacker News.
willclarke.net - Apple is not “recording your moves”
Mr. Clarke's research implies that cell tower and Wi-Fi network locations are recorded, but phone location is *not* recorded, in the file at issue.
Of course, if you request the location of nearby restaurants via iPhone app, then your location is must be determined. I have seen no proof that user accessible *device* location data is stored.
If such data were available, why would an application like "Trails - GPS Tracker" ever need to "Resume recording"?