Ever since I used a text message to pay for food from a Kenyan street vendor, I've been following the growth of mobile banking in the developing world. Foreign Policy's The M-Banking Revolution is a decent overview of the latest developments around the world.
In May, Safaricom took it one step further, partnering with Equity Bank and offering M-Kesho, an interest-bearing savings account, to all M-Pesa users. Subscribers can now use their cell phones to transfer money from their M-Pesa accounts -- using Safaricom's existing network of nearly 20,000 licensed card vendors -- into their M-Kesho accounts. M-Kesho users are also able to access mobile microinsurance and microloan products. By registering SIM cards that double as individualized account numbers, Equity Bank is seeing 8,000 new customers each day, and its CEO, James Mwangi, recently predicted that, in mere months, Kenya "will be the most-banked country in Africa and the developing world."