Temple Sinai operates an email list for its membership. For more information, contact the list owner, Dave Moskovitz.
The Orthodox Shul, Beth-El, have an excellent website which contains information about goings-on in the Orthodox community, service times, candle-lighting times, an “Ask the Rabbi” column, and various other notices.
The New Zealand Jewish List, nz-jewish-l, is a discussion list for topics of interest to NZ Jews. There are often heated exchanges (as you know for every two Jews there are three opinions) on topics ranging from observance in rural areas, racism in NZ, the peace process, through to Israeli politics. Contact the list owner, Dave Moskovitz, for more information.