jfruh writes "M-Pesa is a wildly popular mobile payment system in Kenya, which allows citizens of a country with a poor banking infrastructure to easily transfer money to each other using ubiquitous dumbphones. Currently the system only works in the local currency, but there are plans afoot to allow users to transfer Bitcoin — which would help Kenyans working abroad send money back home without paying high international bank transfer fees."
I have yet to see any problem, however complicated, which, when
you looked at it in the right way, did not become still more complicated.
-- Poul Anderson