Australian shop setup. Provides Australian states (only), realistic non-dodgy, non-third-world countries and GST/GST-free taxes as well as a separate NZ zone in case you want custom postage for NZ vs. other overseas countries.
Install this with your new site to have it ready-made setup for Australian shops - the tax/geo zones work has been done for you.
May improve site performance a bit too, as all the irrelevant country/state information has been stripped out. You're probably not going to be selling products to Nigeria right?
Also, added a address_format_notes field to address formats table, along with a new countries.php that displays this when you update countries. Makes it much easier to get the right country address format by displaying an example
See .sql file for instructions, but basically, install the SQL file using phpMyAdmin or similar, and copy over the countries.php file in admin (not compulsory).