African National Congress
The website of the South African political party
South Africa History Archive
"SAHA's central mission is to recapture lost and neglected histories and to record aspects of South African history in the making."
South Africa History Online
"SAHO's mission is to break the silence of our past and to create the most comprehensive online encyclopedia of South African history and culture."
Sunday Times Heritage Project
An online museum featuring South African history from 1906-2006
ProQuest Research Library: History
(Tip: Use advanced search, but don't try to search within abstracts--very few articles have abstracts in JSTOR. Try searching in the title field.)
Contains complete back runs of about 246 scholarly journals. Coverage for each journal title begins whenever the journal started, with several titles going back to the nineteenth century and continuing up to 1-5 years ago.
Searching the online catalog or databases--you might try this kind of mixed subject and keyword search, trying south africa as the subject and your topic as a keyword, or the reverse.