Sauce Ketchup, a French Google Earth sightseeing site.

Google Running Logs: If you have a server, you can install this to display your own personalized routes on your website with Google Maps. It generates KML as well.

Dan Karran does some thinking about how to make the Drupal content management system geo-savvy. His plans include linkage to Google Earth, obvs. (I’d still like to see georeferences embedded in HTML like so.)