Earlier quoted context omitted.
There is no such thing as money without trust of third parties. Transacting under the auspices of a neutral, trusted third party is what money means. The Fed has the backing of a sovereign power with its own currency and is central to the largest national economy in the world, as well as a great deal of the international economy. If MtGox's earned trust was an apple, you could see the Fed's from space.
"Transacting under the auspices of a neutral, trusted third party is what money means." Can you explain this a little more? How do I need to trust a 3rd party when I use, say, gold as money?
Consider; what does using gold as money mean? Are we trading notional gold? Certificates that claim to represent gold in some vault? Obviously you need to trust the issuer of the certificates. Are you using minted gold coins? Obviously you need to trust the mint and more generally the entire financial system that equates those coins with a certain value. (The history of coin clipping, adulteration of coinage, and the results of having multiple currencies circulating at once[1] should show why this is important.) In fact, the only way that you don't actually need to trust a 3rd part is if...
...you're trading a known quantity of gold to someone else strictly for its value as gold. In which case you are actually trading in gold as a commodity; the technical term is barter. It simply does not fit the definition of money.
[1]: Eg, Gresham's Law: http://en.wikipedia.org/wiki/Gresham's_law