One-day game (50 overs a side) - Australia won the toss and is batting first, which will mean that this evening becomes a South African "run chase" - something they're very good at, and which potentially makes for a pretty exciting second half, provided the Aussies don't have a collapse and fuck it up.
I'm very grateful that South Africa are back in the game - they proved right from the start of their post-apartheid cricketing rehabilitation that they are a dangerous side to take for granted. Australia and South Africa are still only the first and second teams ever to make 400+ runs in a fifty-over session, and they did it against each other and in the same game. South Africa, batting second, won against a disbelieving Australia, who had every reason to expect it couldn't be done again in a hurry.
ETA: One wicket for eight runs, two and a half overs in. This is NOT GOOD.
ETA2: South Africa by a whisker. A damned close-run thing.