Ruth Cole who lives in New PLymouth is a good person to learn about Fermented foods from.
I organised a workshop with her when I lived in Auckland and it was really popular.
The internet has gotten so good at providing information now I think you'd find everything you need there, however put a call out for Kefir or Kumbucha mushroom and you will have someone who is willing to share theirs. I can't help with either, but I know someone who has both. Depends where you are of course. Also sourdough, is good.
Check out the Westson A Price group, which I forgot to mention yesterday. You will find all you need to know there.
The permaculture book of ferment and human nutrition. By Bill Mollison. Available from his publishing house Tagari here http://www.tagari.com/store/12 Full of useful how to information and various different types of fermentation. I have loaned my copy and can't remember to whom. So can't give you any more detail. I found it interesting reading.
I don't know if this is fermenting but just, "put down" several jars of salted green beans. Can give you recipe if you are interested.