Yes - This time I thoroughly checked that it has not yet been posted here...

"The ambitious volunteer-based OpenStreetMap has now mapped more than 120,000 km of South African roads" - http://mybroadband.co.za/news/Software/11499.html

There is also a discussion going on in the site's forum : http://mybroadband.co.za/vb/showthread.php?218624-The-lie-of-the-land-OpenStreetMap - there is a interesting bit about the availability of large amounts of data from the Surveyor General that is not usable by OSM because of a license restricting redistribution.