A module that allows for handling ABN and GST and a few other Australian specific needs.
Has admin interfaces that show under 'Store Administration/Configuration' menu.
Customers enter their ABN in the User node under Numbers tab.
I made this to get around some UC shortcomings. It works for me. Your mileage may vary.
You can view it (at least if your an Australian) at the Batchelor Press Online Store.
Note the modified template for ubercart/uc_order/templates/customer.itpl.php for publishing ABN and GST on invoices
Will move to drupal.org with next version.
All comments and suggestions welcome.