Arriving in Wellington, NZ in a few hours. Just need a cheap option for receiving calls and sending a few texts.
Are these available in 7/11, newsagents or such?
An easy option is 2degrees (although there's also Telecom and Vodafone, if you're staying in cities, I'd recommend 2degrees).
There are many stores in Wellington that sell the sim cards, and last I checked ID was not required (I last bought a sim there 3 years ago).
They have a handy store locator on their website which shows dozens of locations in Wellington to buy - I usually just go to a newsagent or 'dairy' (like a corner store). 7/11s aren't in New Zealand, despite being common in Australia(!).
Would also go with 2 degrees if you want prepaid. You don't need to find a 2 degrees store; the sim cards are also sold at the (bigger) supermarkets like New World, Countdown and Warehouse.
In case you have a smartphone, you probably want to set up the data connection to check your emails or use google maps to find your way around:
Not sure how much they charge pre megabyte on prepaid, but last time i checked it was still much cheaper to use your mobile phone plan than pay for wifi-access in most hotels/hostels. Some places charge you $10 for 100MB...