While it is imperative that the United States implement a sound currency and budgetary model, I am thoroughly unconvinced that a return to a 'precious' metals backed currency is the best way to accomplish this. The proposals that have been of greatest interest to me focus on an energy backed currency. One means of implementation can be examined here http://energybackedmoney.com... Chapter 7 I think provides a very concise overview.
Another website that frequently analyzes how an energy backed currency might be implemented is at http://eddiesblogonenergyandphysics.blogspot.com/ .
Two articles I found very informative were