Hi campaspe8,
I purchased 'Wings' at the end of last year, it gives a great overview of being a pilot in the ADF right from attending your YOU session all the way to your retirement.
It gives you helpful tips to tackle the different stages of recruiting and training like the aptitude tests, FSP and BFTS.
I'm sure you won't but don't use this as a sole resource or gospel as some of the info was out dated even when I read it, e.g. current operational aircraft.
It also focuses on RAAF more so than Navy and Army, which for me as a potential Army pilot I would have liked a bit more info on the heli specific courses but a trip to Oakey fixed that
Overall, for just $50 or whatever it is I think it's worth it.
For other resources, the RAAF website has a wealth of knowledge from history to bases.
The military section of Australian Aviation -
Military | Australian Aviation Magazine
Have a read through the current AIR projects on the DMO webpage -
Defence Capability Plan 2009 - Public Version
Wikipedia is also a good starting point.
If you are looking for aptitude tutoring I can personally recommend Steven Holding.
Cheers,
Mooch