Great piece today on OneWorld:
Entrepreneurs Tackle Sanitation in Africa
African social entrepreneurs making money by selling toilets. Great idea. The Global Water Challenge and Ashoka rock. Think about it: 2.5 billion people don't have toilets - that's a global market of at least 500m toilets, plus nice recurring revenue streams because they all need servicing. Someone is going to a) get wealthy and b) win the Nobel Peace Prize for eliminating fatal diarrhea.
Also check out the World Toilet Organization. Sneak preview: plans are afoot to make November 19, World Toilet Day, an official United Nations Day. More soon.