Ghana in West Africa is also expanding its military capability - particularly in the maritime domain.
See
http://www.defenceweb.co.za/index.ph...ity&Itemid=115
It seems like the piracy problem is getting some serious attention from African countries at last - the need to protect expanded oil exploration and production is also a factor.
In the case of West Africa it seems to me the resolution of conflicts in Liberia and Sierra Leone has created a "peace dividend" which is allowing countries such as Ghana and Nigeria to expand their defence capacity and replace obsolete equipment.