Just about whenever I say that Steve will get his century, he falls short (besides that SCG Test this year - I had a gut feeling he'd score a century) - so this time I'm not saying anything.
Hayden missed out against Bangladesh so he was due for some runs - not that he has performed poorly, but that he would want to cash in on the chance to make lots of runs against easier opposition.
Steve Waugh is yet to register an average against Zimbabwe - I'm fairly sure the only innings he has played against them was 151* - hopefully this will remain the case.
I'd want to think Australia will notch up over at least 500 today, maybe declare, or possibly by all-out depending on how long Hayden and Waugh last for this morning. Then you've got Lehmann and Gilchrist still to come. Could be a long day for Zimbabwe.
Go Steve! 32 Test centuries and still going strong.