Just as most Africans by-passed owning a landline and went directly to owning a mobile phone, most of them have also never owned a laptop or PC before getting access to the web via their phones, and probably never will.
Also, with many Africans (particularly in Kenya and other parts of East Africa) already used to mobile phone payment systems like MPESA, bitcoin could take off quite significantly and spread more rapidly throughout the African continent than in Western countries.
Exactly. Devs who want to contribute to the success of Bitcoin need to put their effort into the BitCoinJ library rather than the Satoshi client.
http://code.google.com/p/bitcoinj/