Here are few pro looking design concepts, you might find interesting (#43, #44, #45, #46, #47 and #48). Hope you'll like some of them, and if you have some suggestions for improvement (colors, layout, fonts, etc...), feel free to jump in with ideas! Thank you!
...of course, we can add obvious Australia outline, but there are so many logos, related to Australia, that it would take real toll on uniqueness of design, and your new visual identity would just "drown" in sea of designs with similar elements. Any thoughts/suggestions!?