I am catching up with Chris sometime this week for discussions etc.I think he is the only one we can get to od this and he may already be working on it. He wrote up an ANZ module for us we used in osCommerce a while ago so he has the hooks etc already on file.
Shane never contacted me but I thought it would be nice to complete extensions for the major 4 banks. The ANZ eGate extension is now available on Magento Connect. It’s currently in beta as I haven’t been able to test it with an actual ANZ account. If anyone uses it please let me know how it goes.