Geocaching with Google Earth
Now you can browse geocaches inside Google Earth. If you've never heard of geocaching, hop over to Geocaching.com and check out the GPS-based sport where "you are the search engine".
Andy Fowler has created EarthCache, a kml script that will retrieve the 7 closest geocaches to the center of your view in Google Earth. Clicking on a cache will link you to its web page on geocaching.com. After the camera inside google earth is at rest for 10-15 seconds, the script refreshes the 7 closest caches.