Antonio Regalado for Technology Review:

Entrepreneurs say mobile wallets are feasible thanks to the rapid expansion of cell-phone use in poorer regions of the world. In the past five years, operators have added more than two billion mobile accounts in developing and poor nations, according to data from the International Telecommunication Union. That compares to 435 million new accounts in wealthy nations (see chart).

A great story about how companies are setting up business that are profitable while helping out people in developing nations.