Celtel just announced last week that they have expanded their One network into East Africa: http://www.celtel.com/en/news/press-release52/index.html. Previously the network covered Tanzania, Uganda and Kenya. Now they have added in RoC, DRC and Gabon. With their properties in Nigeria, Niger, Chad and Burkina Faso, they're well-placed to put fire to the whole continent with cheap communication! Indeed, once the Nigerian Celtel is linked up to the One network, we'll see huge connectivity benefits just because of the immense size of the Nigerian audience.