So, just saw on NZ herald (http://www.nzherald.co.nz/business/news/article.cfm?c_id=3&objectid=10789323) that the Commerce Commission has given the green light for SIM locking, saying that it recognises that "in some circumstances, SIM locking can have consumer benefits". Naturally 2degrees is disappointed by the response, saying they hope other providers don't see the decision as carte blanche to go ahead and do it. Vodafone claims it's always reserved the right to lock phones, and there's absolutely nothing wrong with it.
Curl up with some popcorn, this could be an interesting turn of events.