I have just left my last wwoof host Zarephath Wines near Albany, and I super recommend it.
It's vineyard and the host also makes their own wine.
For wwoofers who are interested in working on vineyard or those who plan to take some training before the grape harvest season, the vineyard in Porongurup is in need of helping hands. There are 6 people living in the vineyard as common community members under the name of Christ Circle (but they are not religious cult group at all). Super nice people and interesting working atmosphere with superb food and wine awaits wwoofers with strength and enjoy outdoor work (speak reasonable English is a plus, but not must). The current job will be thinning grape vines and netting (and some help in the kitchen or household will be very appreciated). I stayed there for over a month, but I have to leave for other errands. There are already another two wwoofers, but more jobs are popping up, and more people are always welcome.
Their contact details are on page 312 of the Jan 2009, page 305 of the July 2008, and page 292 of the Jan 2008 WWOOF books.