As an Aussie, the phrase "a dingo ate my baybee" is one of those things that just sticks in your head. julie did a pretty good job of the accent the woman (Lindy Chaimberlain) had.
And yes, after several trials, inquests etc the woman accused was eventually freed and her conviction quashed.
But, please do not think all aussies have the same accent - when I am in the US, I am mostly accused of having a British accent.
To get some better views of Australia, check out Priscilla Queen of the Desert (sometimes I think of them when listening to Pete..), "The Castle" or "The Nugget"