Web Africa has that lekker Freezone for PC gaming, where if you play on their WAGE servers, they don't count the traffic against your cap, and I think they don't count Steam traffic against your cap either.
I've been thinking for a long time that it would be worth their while to get something going for xbl as well. I have heard from people in the industry that MS SA is trying to push Live in SA, and the biggest problem as far as I can tell is the cost of bandwidth in SA.
It would be a win-win partnership for both of them in my opinion. MS would get more people on Live, and Web Africa would get more subscribers.
I'm not sure what would be required technically though.