Using time and location recordings from Sony’s GPS-CS1 GPS device and the time stamp from a Sony digital still camera or camcorder, photo buffs can plot their digital images to a map and pinpoint exactly where they’ve been.
The 12-channel GPS unit is 3-½ inches long, weighs two ounces, and is sold with a carabineer to easily attach to a backpack or a belt loop.
To arrange your pictures geographically, import the logged data from the GPS device, using the supplied USB cable, and then download the digital images to a computer. The supplied GPS Image Tracker software synchronizes the images on your digital camera with the latitude, longitude and time readings from the GPS-CS1 device.
While Sony says it's for their cameras, I suspect it should work with any image with EXIF information...
Link from DPreview