Jacob Zuma has been elected leader of South Africa's ruling ANC party at a stormy party conference. Unlike in New Zealand, Australia, Canada or the UK, Zuma doesn't automatically gain a executive post such as Prime Minister for being leader of the ruling party - instead, the incumbent President, Thabo Mbeki, retains his office until the next presidential election is held, which will be at the end of his term, as defined by the South African constitution, in 2009. (more)
Phillip Adams writes in The Australian that Australia has a presidential system:

"Australia has had a de facto presidential system since the end of the Menzies era, accelerated and intensified by the influence of television. As in the fight for the White House, our race to the Lodge has voters choosing between two anointed candidates. Holt or Calwell? Whitlam or McMahon? Hawke or Fraser? Keating or Hewson? Howard or Beazley?"
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Cam Riley: South Sea Republic. Freedom, liberty, equity and an Australian Republic.