automatically inserts location in your photos metadata so they can also be used with any 'geocode aware' application like Picasa/Google Earth, Flickr, loc.alize.us, etc.
Tonight's project: walk around the block and take some photos with my Nokia N70 while my GPSlim 236 Bluetooth GPS was logging my location every 5 seconds. Then use open source tools to take the time and location information from the GPS traces and merge