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I think they're fairly commmonly eaten in East Asia, e.g., Korea & coastal parts of China. Both as part of a meal and as snacks (dried squid is fairly common in Asian markets).

Actually, flour made from crickets has been already available for some time: http://www.amazon.com/Cricket-Flour-made-100-22/dp/B00OMCTOD...

"There's not much demand for it outside of Japanese cuisine."

Some Spaniards will beg to differ.

Also, some Chinese. But there's only up to a billion of them, so not much demand.

In Italy it's pretty normal to eat them.