and don't ride over any snakes. they get a bit pissed off and bite whatever they can. that's what we mean by a snakebite puncture here.
good luck... remember things here are awfully far apart. i mean, FAR FAR apart. if you have never travelled outside of europe, it will be very disorienting.
and did someone mention you need to carry lots of water? LOTS of water. when it is hot it is also incredibly dry in the centre. 5 litres a day minimum, plus cooking water. so, that's like 20 kg of water...
good luck!
some would say it is far more comfortable though admittedly longer to go melbourne-sydney-brisbane-cooktown-weipa-kakadu-darwin. a mate of mine did just that several years ago and thoroughly enjoyed it.