I have developed an Australia Post Shipping Extension for Shopify which provides your customers with live shipping rates direct from the Australia Post API.
The shipping rates are integrated natively into the shipping options for your customers when they checkout to allow for a smooth checkout.
The app provides both Domestic and International shipping rates depending on where your customers are and the weight of the order.
Feel free to give it a go and let me know what you think http://shopify.zann.com.au/
Just note that due to Shopify restrictions you will need an account which supports Carrier Calculated Shipping Rates in order to install the Aus Post shipping rates. You are able to upgrade your store to access this option from within your admin.
We were very excited to see the lauch of this app! To install this app on your Shopify store from your admin:
Select Apps under the Configuration section
Click on the green button "Visit the App Store"
Enter in this address: http://apps.shopify.com/australia-post-shipping-extension
Then select "Get App" to install it.
Don't forget to add your comments to let us know what you think of this app!
Shopify Guru | email@example.com