I'm not yet sure how much postage to Australia will cost. I'm going to be diving into postage aspects pretty soon, as we start shipping out the first boards. So I will work on that and post info to an update when I have it.
Flutter will be available in Australia though! I have a couple of large customers from there who I have been talking with off and on since the start of the project, so it has remained constant in my mind. I dug through all the AUS/NZ laws myself so I knew what was needed, and our certification house made sure to do the testing for those regions (US frequencies with EU testing requirements).
I will be making tutorials once the pressure of delivery is off. We have a lot of software to develop too, but tutorials will be one of my primary focuses. I am religiously devoted to the idea of educating people about robotics and the individual aspects like Flutter's electronics, so I have been planning a lot of content to fill out when the time comes. Some of my 3D printed robotics is part of that, but I will have lots of content for those without access to a printer too.
The Flutter pro is not FCC certified, so you will be responsible for soldering on the antenna yourself. It comes with an RP-SMA antenna adapter and a compact RP-SMA antenna. That one has better range than the integrated antenna in the Basic, so it can go farther for a given data rate. Maximum data rate is the same (with better range), but only operation at 20kbps is officially supported as that is what we did wireless certification testing at.
I'll have more info on how the Pro works soon. I am going to try to finalize that and post it this week if I can...