Should the FAA not find suffiecient inprovement, then apparently they downgrade the SACAA. They have recently downgraded Greece and Ghana CAA's. The implication is as suggested above. American airlines will most likely not fly into this airspace and ZS aircraft will not be allowed into US airspace.
I believe that on the previous site, a contributor made the point that with the Soccer World Cup coming up in 2010, perhaps Starlight Cruises will be the only transporter of foreign visitors to our shores!
If the public were made aware of the current situation, I am sure that they would be howling for heads to roll. I guess that is why the 'big' businessmen in this country fly their big private jets on foreign registers?!