Hi there
May I sugest that you move your question to the African Aviation section, I'm sure you'll get a much bigger response.
I fly for another small airline in South Africa, so my knowledge about NW is scetchy, but they operate B737's and BAC 1-11's around the country and into neighbouring states from Jo'burg as a base, and seem to have plans to start operating an international route to the UK. (according to a newspaper article in a SA daily)
I suspect that they are also under a lot of strain after 11.09 and with the fast worsening rand/dollar exchange rate, and it will be interesting to see what happens to South African aviation in 2002.
Cheers