Three messages sent to Obama during his visit to South Africa . Despite widespread poverty , Barack Obama has a vibrant cell phone market . Three African journalists from South Africa , Obama , Kenya will vet questions . CNN will address the questions on African radio stations and via Web video .
More than 5,000 messages sent to Obama during his visit to Ghana . Despite widespread poverty , Africa has a vibrant cell phone market . Three African journalists from South Africa , Senegal , Kenya will vet questions . Obama will address the questions on African radio stations and via Web video .