Seems interesting, that there is possibility that replacement for D700 battery grip comes GPS-enabled.
Patent 2011-085674 filed by Nikon in Japan is for GPS enabled battery grip (there were some rumors several months ago that the D700 replacement may have such GPS enabled grip):
Read more on NikonRumors.com: http://nikonrumors.com/#ixzz1WbkT31cw
Alamak GPS battery grip very useful issit? GPS for what? Is everyone's a tourist?