Adam Franco offers a GNU licensed php script that allows to:
- Generate a KML file from a Flickr photo set
- Directly open the KML file in Google Maps
- Choose what size image to include in the placemark description for each photo.
- Optionaly draw a path (line) from photo to photo ordered in one of several ways: by date taken, by date uploaded, by set order. Useful for making a quick and dirty map of a trip.