A new program called Call for Change allows users to call Burma and other humanitarian causes at no cost beyond what their mobile provider charges for a local call.
Call for Change is a program of Rebtel, a Stockholm-based company that provides low-cost and free ways to make calls on a mobile phone. The service works currently works in 40 countries and 50 U.S. cities.
References / Past Projects
More about Call for Change on the MobileActive.org blog.