GeoTagging Photos

I've been researching GeoTagging, the point where GPS and Digital Camera meet. Basically adding metadata to photos to include GPS coordinates to reveal where the photo was taken. If all photos were GeoTagged, one should be able to search for a location on an online map and get an option to view publicly shared photos from the area. An example of this technlogy can be experienced at www.flickr.com/map. Flickr seems to have the idea right; however Flickr isn't really one of the sites I frequent to plan travel arrangements.