What can you do with acorns?

The early CA native populations to use eat them. They would ground them, poor hot water over them to get the acid out, and then make them into a tortilla type of food and heat them over hot rocks. I never thought it would taste very good, but my dad tried it and he said there wasn't much of a taste to it.

http://acornfood.blogspot.com/ is a great source for acorns and the prices are very reasonable.