Mike's been working for years to bring a number of bur oaks to the stage of producing acorns. Claims that type is edible without leaching. No nuts yet.
Speaking of nuts, the pic of the squirrel on 'how to eat an acorn #1' was indeed something to behold. There was a band not too long ago with the name 'Squirrel nut zippers'. Things that make you go hmm.. lw