A mate of mine recently landed and left from Auckland airport, and used free wifi from within both terminals.
I gather that previously it was either pay, or use the wifi within the airline's club lounges?
Not sure when this started because their web site and online comments don't refer to the free wifi at all.
I thought he may have been near McDondalds, but the sign-on screen is definitely not theirs ... the offer is for 30 minutes free, plus payment options for longer periods.
Wellington airport has had free wifi for 6 or 7 years now, so good on Auckalnd, eh?
R.