iPhotoToGoogleEarth 1.0.3 - View iPhoto GPS-tagged photos within Google Earth. (Free): "
iPhotoToGoogleEarth is a plugin for iPhoto 6 that will export photos for viewing in Google Earth.
To make the most of iPhotoToGoogleEarth you'll need to have GPS infomation stored in the Exif tags. If you don't know what that means this plugin probably isn't for you. GPSPhotoLinker is recommended for GPS tagging.
Once you have photos tagged correctly, select your images and then Export. If you have a track log (in NMEA format) you can include it with the images and configure the line thickness and colour. If the track is very long you may wish to lower the detail (it skips points) so that Google Earth runs smoothly, this will depend on how fast your computer is.