Sony GPS tracker for photographers

Sony has today announced a very interesting little device for recording the position where photographs are taken. The GPS-CS1 is a small (9 cm / 3.5 in) cylindrical device which you simply attach to a backback or belt loop and carry with you while you shoot, it records your GPS location and this information can later be synchronized with your digital images to provide a map of where your photos were taken. We assume it does this using date and time information stored in the image header (which obviously requires your camera's clock to be synchronized). Interestingly the mapping solution is an online website with maps provided by Google Maps (it appears that the synchronization software will write the GPS location into JPEG EXIF headers).