The Google Earth blog identifies surface to air missile sites around the world.
Ethan Zuckerman also notes that digital activists in Kenya are mapping outbreaks of violence across the country.
Meanwhile, the United States Holocaust Memorial Museum and Google have begun to map violent incidents in the crisis in Darfur (and of the Holocaust).
All this is fascinating. But someone has yet to explain to me why any of this is useful. Are any of these exercises more substantial and less stomach-turning than the ever-expanding crop of humanitarian video games?
Some other finds reported by Google Earth: