Google Earth launched 10 years ago today! I had the honor of doing much of the service's configuration and performing the actual launch process in 2005. At the time, Google knew how to serve lots of small requests (i.e. searches), but images, not so much. Google Earth quickly became Google's biggest user of bandwidth, and we had a few close calls during the first week where we nearly overwhelmed the network hardware. I was not popular with the production team for quite awhile.
My favorite Earth feature is historical imagery, which I helped design along with +Reuel Nash
who did most of the work. There was a great story about some farmers in India who used historical imagery to receive compensation for their land when a new highway was being built. The government claimed that the land was not under cultivation when the highway was planned, but Earth's historical imagery showed otherwise!
There were so many other great launches in Earth: Sky, Moon, and Mars, Ocean, the Web plugin, the flight simulator (which I opposed and nearly cut), camera tours, Street View, and the Android and iOS versions. It was even ported to some high-end cars.
Congratulations to everyone who has kept Earth going all these years, and especially the Keyhole team who dreamed up and built the original product on a shoestring budget.