My colleagues in the US have been working with Autism Speaks and the University of Washington Autism Centre to produce a series of free PowerPoint templates that can be customised to explain social situations to children with autism, as well as a series a Word templates of documents and forms for the Autism Speaks 100 Day Kit. The Autism Speaks 100 Day Kit was created specifically for newly diagnosed families to make the best possible use of the 100 days following their child's diagnosis of autism, Asperger's Syndrome (AS), or high-functioning autism (HFA).
The PowerPoint templates cover social situations such as going to a restaurant, going to the doctor, personal hygiene, getting ready for school, and getting ready for bed; and the Word templates cover initial planning, progress tracking and transition planning.
Although these templates haven’t been developed specifically for Australia, they are still a good starting point for parents or educational professionals looking for resources, and they can be further customised for specific children, or generically for Australian scenarios. The templates are all available freely online (and if you wanted to publish localised versions, then I’m sure that Autism Speaks would love to hear from you)