Following on from his article in Vector 247, Nick Wood has been continuing his search for South African SF:
But it is also clear that the language of science (fiction) does not necessarily hold sway in South Africa. This is not to say that it is a primitive place, pre-scientific in understanding and experience – these are colonial notions based on beliefs of Western civilisation as a teleological end-point for socio-cultural development. There are a multitude of discourses operating in South Africa, as befits the diverse (and sometimes fractured) nature of experiences and cultural contexts, which underpins the diversity of the country’s human resources.
EDIT: Judith Berman also has some discussion of her article “Bears, Bombs and Popcorn“, here and here.