What about using ether to create local currencies? If you took the credits($1.00 for example ) from a local barter exchange, and replaced them with a token that contained $0.01 worth of ether and maybe $0.24 worth of Silver. Whoever wanted to put up the silver and ether could be put up by investors in exchange for tokens at the ICO. The holders of the barter credits would get to have external value backing their internal currency. If they want to spend their tokens off exchange, they can still get 1/4 of the value of the token (assuming no inflation) or they can trade it on the exchange for $1.00 worth of in kind services.