Australia Post API

Real time postage calculation fro Australia Post.

"Australia Post API for Shopping Carts" ( http://bit.ly/cclHtj )
"Australia Post eDeliver" ( http://bit.ly/auyEhw )

API at http://drc.edeliver.com.au/ratecalc.asp

Try this:
http://drc.edeliver.com.au/ratecalc.asp?Pickup_Postcode=3198&Destination_Postcode=3199&Country=AU&Weight=150&Service_Type=STANDARD&Length=150&Width=15&Height=150&Quantity=1