hey matey,

There are a few of us Aussies using this too.

Just some things to keep in mind:

Setup Tax for Australia (10%) and ensure workflow is configured
Setup Tax for Australia (12.5) and ensure workflow is configured
(Steph &I are talking about a contrib to the development of this if needed.. Interested???)
Add the Australia Post module
If you don't want people downloading the pics, just watermark them
Add thickbox
Options are as simple as adding "attributes"

Some threads to keep an eye on:
http://www.ubercart.org/forum/support/2403/australian_cart_using_auspost...
http://www.ubercart.org/forum/development/1919/cart_review_problems (links to Auspost)

I would like to push this further, if I get time I will lend some knowledge...