I recently noticed that the Superbuzz calling card is offered with free access from Vodafone mobiles.

Does anyone know if the solution below would work, and if there is anything preventing it from working.

I see that Superbuzz charge upwards of 30 cents for calling NZ numbers, but say I called a Australian calling card dial in number and then called back to the NZ landline I wanted, would this work?

The cost would be 0.075 cents per minute from NZ using superbuzz to call Australia and around 0.04 cents to call back to NZ by routing my call through an Australian calling card.
So I would be able to call NZ landline numbers for around 11 cents per min, which seems extremely reasonable price wise.

It seems a bit of an effort with lots of numbers to dial in, but most of my calls are of length duration, so once Im through I could talk for say 30 mins for only $3.30 to NZ landlines..

Anyone have any opinions/suggestions?