The DC9s are flying for Antrak:
http://www.airliners.net/open.file/901966/M/
Heard from a source in ACC that Antrak are looking at getting their paws on B757s/B767s to start West African scheduled flights, possibly with JNB as a Southern African destination.
As far as GIA goes they are not operating any of their own flights at the moment, but have signed code sharing agreements with VK and LH for regional and long-haul routes respectively.