I have just uploaded a long overdue update to the Fontis Australia extension. The big new feature is that it actually uses the postcode database that has been in there for the few versions! When entering the city in an address, such as when editing your address book or during checkout, you should now be prompted to select from a list of cities matching the text entered, along with the states and postcodes for those cities. Selecting one will fill out the state and postcode fields accordingly.

Here are some screenshots of the process in action:

Selecting a locality

Final result

Please note that this is still using an older version of the locality database, which has the locality names in uppercase. The latest version of the database has localities properly capitalised. Also note that this will obviously only work when Australia is selected as the country.

I think this is pretty nifty little feature and hope others get something out of it as well. Let me know what you think in the comments.