I can only think that only a real market can control a price of any commodity or currency and the a central bank that dumps and buys as needed to control the price would be the only way I know to make a stable currency possible.  as I said before you can peg the value of a currency to anything you want.  It's "The Trust" holders that should decide what they want to hold as there base of value of the asset holdings and just use the crypto coins to pass the value for P2P transactions.  I have almost completed the infrastructure to make all that possible in the BeerTokens model http://bitcointalk.org/index.php?topic=9493.msg138247#msg138247.  The first beerA coins have already been minted with the new merge mining feature using MulitCoin-exp https://bitcointalk.org/index.php?topic=24209.msg300830#msg300830.  With MultiCoin  we also can setup secure exchanges with escrow deposits to prevent third parties from stealing from a central exchange.  I will continue to develop what I feel is missing in the infrastructure to make what  sounds some of you want in the near future.  The basic concept is that the holders of "The Trust" decide how they want things to be and what needs to be changed, Not the developers and miners.  Each holder on record has a voice.  You just have to make it heard by being a part of it.