Wow, Sony has a little GPS device that will sync/tag your photos with the location they were taken (via a time stamp and software) - back in 2004 I used a GPS and a hacked camera to do the same thing, well, a DIY blackbox for cars - it was an ugly hack but worked! - Link.
http://blog.makezine.com/archive/2006/08/tag_photos_with_location.html