There have been a few postings on The Mobile Genealogist regarding GPS units that attach to your camera to keep track of location information as you take digital photos. Now Sony has a product that does not require any connection to the camera, it only needs to be on your person as you take the photos.
If that sounds interesting and you want to know how it works, click HERE to head over to Engadget to read more about teh Sony GPS-CS3KA.