Using iPod Touch 5g. So I'm at work, and I snapped a few pics at my desk the other day. Yesterday at home (a few miles from work) I accidentally clicked the 'Places' tab on Photos and lo and behold, it had a pin on the map where my workplace is. Further to that, as I was walking to work this morning I had the 'Maps' app open and I had the arrow 'location' button clicked, and to my surprise the 'blue blob' was following pretty much exactly where I was - although sometimes it was a few metres out. I'm guessing it has something to do with Wi-Fi, but I wasn't connected to any Wi-Fi networks at the time, and all the networks around were protected. Any ideas on how it works? Try it out and let me know if it works for you also.