I wrote a small application to deal with NEF format -  Nikon Raw files, to match GPS data from SONY CS1 with NEF files and write into them. Similar with SONY own GPS Images Tracker: Find it here:

http://www.nikonfans.org/index.php/gps4nef/

Any question, Please feel free to let me know.

I have my photography blog at http://www.nikonfans.org, but most of txt content is in Chinese. It's ok, my Flickr is at http://www.flickr.com/photos/nikonfans/

Edward