I used to wear my Garmin GPSmap 60C GPS receiver on my coat and tracked my movements and downloaded the GPS track unto my computer where a freeware program could match the EXIF timestamp of the photo with a location in the track. Nowadays I use a tool in Picasa2 and drag the photos over the Google Earth map. A great addition to this would be to allow Google Earth to export a series of photos as a Travelogue in HTML to be used on Blogger / Blogspot so that instead of a number of sequential posts, you add points to a map view and by clicking through you get to the photo and description.
