There are two online fora I would suggest. First is
Fodors. Overall, I think Fodors has the best destination-oriented boards on the web.
Secondly, you might check the Australia & New Zealand section of
BritishExpats. While the message board is geared mostly towards immigration, there is much good basic info there among the 22,000 posts about AU & NZ if you use the search function.
Additionally, I was there last March and will be returning for another long visit starting February 9th. If you have questions regarding itineraries or guide books, I've some suggestions also.
[This message has been edited by BillMorrow (edited 01-20-2003).]