Did the question about edible acorns get answered? I missed some of the
posts but did find a answer to the question. One man spent years
researching oak trees with edible acorns. He wrote a book called:
"Nature's Garden" It was published this year and has a whole chapter on
oaks. He has charts with tanin content of acorns and explains how the
myth of a edible acorn got started. The key fact is: using taste is
not a reliable way to determine tanin content.
Jeff Owens, Zone 7 oaks and nuts