Actually Moerderloos your position doesn't work: The playstation is distributed by Ster kinekor and not Sony. How would that be different to Nu Metro distributing for MS.
If they did the games would be available EVERYWHERE, exactly the same as the playstation.
The killer for the 360 is Live! Microsoft can/will set up central servers and probably a dedicated low latency link to Europe. Sonies online service depends on the publisher, which is much more difficult to pull off in ZA, meaning all teh game importers will have to set up their own servers and international links.