The Wool Shed Museum of Sheep and Shearing in Masterton has a display about the history of spinning (pictured at right) as well as a small collection of mostly WW2 wheels.
http://www.thewoolshednz.com
The Agrodome Woollen Mill near Rotorua has some New Zealand spinning wheels on display.
Open 7 days a week.
Western Road, Ngongotaha, Rotorua, New Zealand
Tel (64-7) 357 1050 ext 722, fax (64-7) 357 5307
website http://www.agrodome.co.nz
Guide to New Zealand Spinning Wheels 