New Zealand MUG
This is a jump-off point (for now) to the New Zealand MUG:
There is also a New Zealand mythtv mailing list, subscribe here
Archives are here:
the list is a good place to find out about Myth and general TV issues in New Zealand, including EPG data, Freeview DVB-S, Satellite and no doubt in due course the Freeview DVB-T (when it becomes available).