As I linked to earlier, the World Bank has had a change of heart over the recent years, and now lends small amounts for small projects, empowering the locals to help themselves. This is apparently working at reducing poverty, improving education, etc. The UN is also at work, although you won't read much about it for some reason. I read about a UN school in one African country, underfunded, no desks (They used all their money for books), but their it was, at work, and and hopefully creating an educated new generation.
Australia has been involved in local peace keeping operations (not all altruistic, we got a fair bit of oil from the east timor peace keeping operation, for example). But still, doing our bit in the Solomons and Papua New Guinea. If Australian troops were committed to a meaningful (that is, they aren't likely to be massacred), peace operation in Africa, I would be all for it.
One final gripe they appear to have in Africa is the way that subsidised (read, the whole western world) farm products undermine the viability of their own local farmers.