Most of the well populated (read: "full") servers have populations of over 10 000 players. Even if all the South African players agreed to move on to the South African server, (assuming that they would, which I strongly doubt, and assuming that Blizzard would deign to notice us and give us a server of our own), I still don't see Blizzard creating a server for us. I don't think our numbers justify it. Plus, where would they create it: on US or EU realms?
We don't really have a big MMORPG culture, and for me, that's evidenced by the fact that RAGE didn't even have a simple display regarding the WotLK release of WoW despite the fact that it was held in October, and Wrath was released in November.
So, sadly, we don't get our own server. I just wish Blizzard would allow transfers from the US realms to the EU realms. Really don't see why this isn't possible. The latency is better, and the fact that the timezone is closer to ours means less raiding at 4 am in the morning.