Ultimate Oz

If you want to work and travel in Australia, I really recommend booking your first week in Australia with Ultimate Oz in Sydney. You do a lot of fun stuff like a dolphin cruise, Sydney city walk and sandboarding (look at the site), they have great guides/leaders (Anna and Becky) and they help you with the boring stuff, like bank account, sim card and TFN. They also provide a lot of info and help you with booking other great trips.