Just noticed that the awesome book and DVD price comparison site booko.com.au has a NZ site - booko.co.nz.
So how many people use it to compare book prices before buying online? Do you buy books online? If you do, which online bookstore do you use? Book Depository? The Nile?
I've only bought from Book Depository to ship to NZ once (Christmas present for relatives there), and it worked really well. They tend to consistently be one of the cheapest book suppliers.