Run TrackLogger while you're out taking pictures with your DSLR or other digital camera, then import the track log in Aperture and see all your photos on the map.
Or use the track log with Google Earth to see where that last hike took you.
TrackLogger is very easy to use. All it takes is three taps on the screen. One to start recording, one to stop and one to send the track log to your inbox.
Aperture bug: There is an issue with Aperture that causes the track log time stamps to be one hour off. See the home page for more info.
Get it on the App Store.