Originally Posted by Latitudes
It is--or rather was--Keyhole. Google bought Keyhole last year so it is a bit more than a re-branding. One nice difference is that Keyhole was $299 to purchase; Google Earth is $0.00! ^ ^ ^
Keyhole was $29 after the free demo (which Google Earth recognized and told me had expired when I went to install it). Google Earth also has $20 and $400 versions with higher resolution.
I'll take a free version though. WorldWind still has some things GE doesn't, but it's neat to play with both of them. And I do mean play.