Hi Im also in Australia , my experience developing anything in ubercart is minimal but im willing to put some time into it having some programing experience and well because I need this .

Has any more progress been made with this module ?

Implementation of Size based Cubic cost and any clean or debugging needed.

Add the following fields to products ( width , height, length and weight )
Add group Australia Post Calculator and put them under that.

This gives us the item info to at least work with for calculation of individual items maybe a default size box could be defined if the sizes are blank

As for code i dont know I will have to figure out how this works and see how I go .

But if anyone has done further work on this lets get the development done and the module completed, if there is a place for better group code development lets get it going there and let me know

thanks