As with all these things Waren9 it is hard to determine exactly. The Jetstar NZ operation gets split in two when it comes to profit/loss. All the Tasman sectors which are the majority of the flying have the profits/loss allocated to Jetstar International profit/losses. Only the pure domestic operations fall under Jetstar NZ, during the last financial year the domestic JET operation was 7 figure profitable.
As for the Dash 8, that is setup under an entirely separate company again with the aircraft and majority of crew currently provided by Qantas....... So your guess is as good as mine. I would think that with the massive amounts of resource being thrown at it there is no way it doing anything than losing loads of cash.