I got BPAY working last night and have added it, as well as the direct deposit functionality created previously, to the Australia module page on the Fontis site. Hopefully the instructions are clear enough: the module as a whole is started to get more complicated now that I had to start defining custom template files.
I have just finished adding a basic direct deposit payment module to my Australian Magento module. Development only took a day - again, because I didn’t understand some basic things to do with the Magento/Zend framework - and was mostly done by replicating functionality for the Check/Money Order module that’s already in Magento. Although direct deposit is currently lumped in with the rest of the Australian stuff I could always extract it if people in other countries would find it useful. I’m not sure how popular a payment method it is overseas.
The next order of business will be cleaning up the code for release and then moving on to the development of a BPAY payment method, which should be pretty similar to direct deposit.