The following are useful Heritage links:
The Majestic Theatre SaveTheMajestic (Facebook)
ShakyTown Blues- Rebuilding in the Christchurch CBD Red Zone - Acerbic blog by a central city Red Zone heritage building owner.
Icomos NZ - The New Zealand National Committee (ICOMOS New Zealand /Te Mana O Nga Pouwhenua O Te Ao)
(The International Council on Monuments and Sites i.e. international NGO Heritage Professionals engaged in Conservation)
Its Our City Its Our City's Bill Demeter often covers heritage issues in his podcasts.