We check this website, now kowai.co.nz is up and dont blocked for our system and other users of the Internet.
So, answer to question: Is kowai Down Right Now? - NO! kowai is up!
If you have problem with access to site kowai, and domain kowai.co.nz is not avalible.
Clear browser cache and/or try other web browser
(Chrome, Firefox or Safari).