Just some random thoughts on Australia. The accommodations when traveling on a National Geographic Journey with G Adventures are upgraded and very nice. Each of the hotels we stayed at had a nice included buffet breakfast, some had gyms, all were very clean and comfortable. As is the case almost everywhere I've traveled, the people are exceptionally nice, and always willing to give travel tips from a local's perspective; their favorite restaurant, view spot, bike path, etc. In addition to driving on the other side of the road (I don't say the wrong side anymore) people walk on the other side of the sidewalk, same with bikes on bike paths. An important one to keep in mind is that escalators go up and down on the opposite side that we are used to in the US. I saw a number of people walk up to the wrong side of an escalator, sometimes with embarrassing, and occasionally pretty painful, results. So it's important that you don't just look both ways when crossing the street but to be aware of this at all times. We actually started noticing that when people walking towards us would pass on our left, they would say hello or good morning, but if they pass us on a right it was usually "g'day mate". Also, regarding the money, they use the plastic bills that many countries use these days, assorted sizes and colors for the different denominations. One thing to keep in mind is that the $2 coin is actually pretty small, one of the smallest they have, remember it's not like a penny at home. It's actually worth $2.
Shoot an email to: doug@plazatravel.com if you have any questions or want more details about this, or any of my other trips!