I have been wondering about some of the same stuff. I've eaten my fair share of yogurt,drink a kambucha once in a while,like sauerkraut,not a huge fan of kim-che .What other ways can people get the benefits of FF? I am guessing that cooking something that's been fermented kills off the live cultures ,but does the concept of the nutrients being more available still apply after it's cooked?
Cooking is another way to "release" the nutrients in food. I believe that some studies show cooking after soaking, sprouting or fermenting grains can be beneficial, though likewise probably some of the more delicate things (living probiotics) are destroyed during cooking.
Here in the USA we mostly get our ferments from dairy, alcohol, pepperoni on pizza, pickles on hamburgers, and maybe sourdough bread or sauerkraut if like those "sour" things. Oh, and soy sauce, tofu, or tempeh, though I don't believe the industrialized versions of those things represent true fermentation. Yeast for bread is a form of fermentation, though I don't believe it has acted upon the grains enough to improve the nutrition ... it just helps make them more fun to eat. This is likely true for lots of pickled things unless they are traditionally pickled. You can pickle eggs ... not sure how that adds to the nutritional profile of them, though ... hmmmm
Internationally speaking, fermentation is a big deal. A lot of the world's population has traditional fermented feeds ... I'll skip the examples and provide some links that discuss the importance of fermentation both by thing fermented and by region ... so do take a look at the links even if you don't read every word ... the lists are extensive.
The first two were produced by The United Nations. That's how important fermentation is to a lot of the world. I especially appreciate the one on Cereal Grains as that is particularly important to keeping chickens.
This one is about fermenting Cereal Grains ...
http://www.fao.org/docrep/x2184e/x2184e00.HTM
This one is about Fruits & Vegetables ...
http://www.fao.org/docrep/x0560e/x0560e00.htm
I turned to Wikipidia for a list of fermented milk products ...
http://en.wikipedia.org/wiki/Fermented_milk_products
Here is an overview of Fermentation in Food Processing by Wikipedia ... in addition to the items discussed above, it discusses alcohols and meats and even tea ...
http://en.wikipedia.org/wiki/Fermentation_in_food_processing
Happy reading!