From Foreign Policy, a map showing increased connectivity and the importance of investing in Information & Communication Technology for Development (ICT4D) in Africa.
As interconnectivity between African countries increases, economic benefits are expected, especially in Kenya, which has a fast developing IT sector. Other potential impacts include education and access to media.
Increased interconnectivity also means increased importance of online media.
See also this 2007 global map by Alcatel-Lucent (5.6mb PDF).