Enough with the drop bears everyone. DFNewb, they're a joke we tell to scare tourists. They died out on the mainland a long time ago (around the 1800s IIRC), the only place you'll still find them is the tablelands in central Tasmania.
Regarding everything else,
1) Racism is no worse than anywhere else, and better than a lot of places. We have our dumb, unwashed rednecks (they're called bogans here) just like everyone else, and those aside we really couldn't give two tosses where you're from.
2) Codezero wasn't kidding about the ozone hole; it is out to kill you (unlike the wildlife, which while dangerous generally doesnt care about you, our sun is evil). We have summers that frequently reach 40C or higher in most of our major cities (hot enough to buckle train lines in Melbourne last summer).
3)Vegemite is delicious, but is definately an acquired taste. If you want to try it, do it on a heavily buttered piece of toast and add some cheese, as straight vegemite can be a little overpowering at first.
4) Our beaches are fine, unless you're in Queensland (where the great barrier reef is), where we have little jellyfish, covered in trailing tentacles that contain very potent (and excruciatingly painful) neurotoxins.
5) We have a lot of desert. If, for any reason, you ever go driving across the desert, make sure that people know where you are and when you should be arriving, you have spare water, fuel, and tires, and finally, if all else fails and you do breakdown in the bush, DON'T leave your car; it can be 100s of kms to the nearest town, through some of the most inhospitable terrain in the world. If you live in the cities though, disregard that.