I came across an article on Gizmodo Aus that the Shield TV will be sold in Australia starting at $249. I assume this is AU dollars as all the articles I could find were Au websites.
The Shield TV must be due for release/sale soon as the article says "We'll be spending some time with the SHIELD later this week, and I'll have my thoughts for you when the embargo lifts"
Assuming the AU$249 is for the US$179(AU$241) remote only Shield TV then its pretty close on price.
I couldn't find an official press release but did find an article on the Australia PC World website saying that it will be available from "PB Technologies, Computer Lounge and Playtech in New Zealand."
I guess if your looking at getting a shield then maybe hold off a bit and see what happens in July to hopefully be able to by locally with NZ adaptor.