While looking for random vidcasts, I stumbled upon go-opensource.org, which seems to be in touch with a lot of the open source stuff going on in Africa. All sorts of interesting projects and links underneath it. It's always neat to stumble upon a corner of the open source community you never knew existed. :)
Don't know how pro-ubuntu they are, but it might be a good way to track down Fedora Ambassadors in Africa.
Best, -- Elliot Red Hat Summit Nashville (May 30 - June 2, 2006) http://www.redhat.com/promo/summit/