Gary Price, News Editor of Search Engine Watch, blogged today about a new game utilizing Google Earth. I looked at the directions and it seems not only fun, but a good way to get a handle on the features of the new Google Earth product. The instructions and information are available here, and you can play towards gaining entry into the "Expert Version." Yes, not surprisingly, there are AdSense ads on these pages. Help support the game creators and Google, all while having fun! :P
Sounds like a fun time for those of us who have it...I will tinker around with it and others are invited by Gary to share their thoughts at the SEW Forum thread about Google Earth: The Contest.