Nice demonstration of smart system design, but the first item on the Australian government's specification would be the use of a private Australia-based system.

Nice demonstration of smart system design, but the first item on the Australian government's specification would be the use of a private Australia-based system. The bureaucrats who wrote the spec will have limited understanding of data security, and will believe building their own local system costing an order of magnitude more than a cloud-based system must be an order of magnitude more secure. On a much smaller scale, we provide a school interview booking system used by thousands of Australian schools, built on Appengine. Sadly Queensland's state government has woken up to the fact that the data (names, email addresses and booking times - not hugely sensitive information) is stored overseas, and we're having to jump through all sort of hoops to avoid a blanket ban. Basically if your customers are not in the US, you'll be well aware of this issue.