This is possibly the best blog entry I've seen in many months. It's a summary of some really interesting Google Maps searches
The quality still isn't great but the potential sure is interesting. I for one love the airplane graveyard search
North america sure is interesting geographically because it's so varied but just imagine the potential when Google Maps reaches the whole world! (probably not North Korean) And on this page, make sure you have a look at the slideshow in the Wired article they link to.