NuBits – The World's First Stable Digital Currency
nubits.com
nubits.com
I live in Argentina and we had for a few years the "Convertibility" 1 Peso = 1 Dollar. Until it disappear. http://en.wikipedia.org/wiki/Argentine_Currency_Board
People who don't live in the U.S can still us NuBits, just like people who don't live in Europe, can still use Euro. NuBits just acts as a way to digitally send money to someone using a currency that is pegged to the dollar.
If you have any more questions, you can ask them at the forums, which can be found at: http://discuss.nubits.com