jonherries: Observing from the outside, the Snapper solution makes money for NZBus. Ie. load your card, they hold your cash until it is "spent".
Therefore the Snapper guys are doing what Birkenhead and Newland do for their own gain (just at a larger nicer scale) and none of it is interoperable.
Hence the Thales contract to try and make everything work together. Unfortunately this won't succeed until they push everyone to a single standard. This won't happen until they re-tender the bus services and add it to the contract. Who knows when this will be.
Jon
Yep, many operators have had their own solutions. Ritchie's on the North Shore already have a contact-less smart card, and by moving to an integration solution, it means that they are potentially giving up having millions of dollars in prepaid fares sitting in their bank account earning interest.