I went there in 1986 when i was in the navy. There is really not much to tell all though I have heard things have develpoed somewhat since that time.
Don't expect a raving night life or anything, in fact I think the country is dry like most pacific island countries although foreigners can probably get a beer somewhere.
Pretty sure they still use the NZ dollar for currency. Not very informative I know but it was a while ago. I am sure you will have a nice time with the nicest people you will ever meet.
" Help, help ... I'm being oppressed ... "