blair003: I can get the payment screen but it rejects the payment in google wallet.
For those that successfully ordered: was it on your normal google account? Was it your normal NZ visa/mastercard?
Finally... managed to place my order and all the Youshop/Google Wallet tricks mentioned earlier in this thread worked (thank you).
In answer to the question above, Yes my NZ National Bank (Visa) CC was accepted, although nothing has been charged yet (until they have the item in stock).
It did ask me to fill in the billing details of the card, to which I gave it my Youshop details.
So, here's to the next 6-7 weeks (plus youshop delivery time) to go very quickly please.
Good luck to others who are trying to purchase through Google Play.