This NPR article presents an overview of the stoves program at Aprovecho in Oregon, and mentions the enormous scale required: a need for 500-600 million cookstoves is estimated. Fenix similarly is working hard to scale its energy solutions for the 1.5 billion without electricity.

Procter & Gamble is making a big strategic investment in the base of the pyramid. Fortune Senior Editor Jennifer Reingold wrote a great article about this initiative, traveling to rural China to observe P&G's product development efforts. 

Entrepreneurs in Uganda are making public phones "mobile" with bicycles. In many frontier markets, cell phones have fully leap frogged land-line technology, to the point where public pay phones are actually cell phones built to look like desktop phones...

Melinda Gates explains what non-profits can learn from Coca-Cola