RoboGEO really has quite a few tricks up its sleeve when it comes to georeferencing photographs. It aready provides Flickr users with Flickr2Map, a free service that links geotagged Flickr images to their location in Google Earth, Maps, and other apps.
RoboGEO also makes a standalone PC application that lets you marry GPS data with pictures in many different ways — version 3.1, out today, intergrates with Flickr and can handle Google Maps’ new API. (It already does KML, obviously.)