I have been interested in tagging my photos with gps data and Nikon just released their GP-1 gps unit, but is geotagging your photos really worth $240? The competition seems to be the di-gps pro which comes in at $313 with shipping. It would be nice if I could reuse my bluetooth gps unit I use in the car, but a Bluetooth adapter is $249. Maybe a christmas gift for someone who has everything, but I think I will skip for the moment.