I suggest that for this site and particularly in the private beta that we avoid asking questions that can be answered by Wikipedia e.g. 'Which groups arrived in Australia before the arrival of the first fleet'.
These types of questions, although are historical and are interesting to a large group of people are too easy to answer and will not draw visitors to this site once it is public.
The main reason these questions are bad for a site like this is because wikipedia will be guaranteed to provide a more concise and detailed answer than someone on this site can.
Try for something more challenging, the aim for the public beta is expert level questions, why ask an Australian historian a question they can answer in their sleep? Our aim should be to draw experts who have questions they can sink their teeth into and visitors who feel they are getting unique questions and answers that they haven't heard in their backyard BBQ with their mates.