I've been googling and searching. There was a story of either an old woman or a priest that saved a bathtub of copper pennies and used them to get through the inflation in Germany after WWI.
Here is a thread on snopes.com about it, but if you search there are other accounts of it also.
http://message.snopes.com/showthread.php?t=42738
I just wonder if the general public is going to accept a nickel beyond face value, even in hyperinflation where it's metal value is 30 or 40 times face.
I know in Argentina, coins where hoarded, and still are. I read some accounts where coins where hoarded in other countries, and other accounts where coins where worthless.
I think a lot has to do with the metal the coin is made of, but even an aluminum or zinc coin would be worth more than face value. Seems most Governments in hyperinflation just drop coins all together and just print notes.
Guess I'm just starting to doubt the wisdom in stacking Nickels as an hedge against hyperinflation. I know it will pay one day, but how long will I have to wait?