Quick on the heels of mobile payments will no doubtedly be broader money transfers on mobile. The foreign remittances opportunity alone is considered a $1 trillion market within 5 years, all transfered via SMS platformed transfers. In addition the capability for IM transfered funds exists as well, broadening the quick payments segment to a fully Web (Mobile) 2.0 solution.
If interested check out my recent posting “The Next Big Thing for Mobile: Bottom of the Pyramid Plays” at http://paulrruppert.typepad.com/blog/2007/06/carnival_of_the.html

Paul, thanks for your comment. Your detailed post is a worthwhile read indeed - all the better since you tied your observations back in with C.K.Prahalad’s work. (I’m a great fan and follower of his thinking...) I share your conviction that SMS & MIM innovations will impact and transform mobile payments in the emerging markets. You don’t cover the obstacles though - and there are plenty ... not to mention the danger of abuse by parties who would rather wash their money than transfer it....