What a cool social marketing tool! This video by Maasai rap artist Mr. Ebbo propagates the KickStart MoneyMaker pump, one of the most successful BoP products (its inventor recently won the Lemelson-MIT Sustainability Award.) I saw the pump advertised in a number of places in Mali earlier this year.
[youtube=http://www.youtube.com/watch?v=zIDzBQ6meYY]