Its a simple idea, leverage the advantages of the devision of labor in order to overcome government meddling.
The exchange would open up shop probably in either los-angales or new york and would only accept deposits in the form of cash at the front counter. The exchange would be safe from a myriad of legal trappings which would allow them to focus 100% on the service they are intended to provide and the market could innovate highly decentralized mechanisms of getting cash from one side of the country and into the front door of the building. Decentralized community of peers working within the framework of a reputations systems could provide the money transmission instead of some big payment processing company. As an example, suppose we have two brothers, one lives next to the exchange and another 1000 miles away. The one brother could take payments and the other would make deposits and when ever they visited each other periodically they would clear out the debt between each other, always operating within the black or gray market.
There may be a really good reason why this doesn't exist and i just havn't thought about it yet.
It sounds like a dream come true. I know the government would make it impossible because they feel the urge to look into all financial transactions. In real life we call this busybodyness and let our neighbors know that they aren't welcome to pry that closely, but when people win popularity contests they feel it gives them the right to do this kind of thing and to even prevent some transactions - and to punish you if you don't comply.
Another thing I would like to see is a precious metals exchange. This could operate a little bit like those "cash for gold" places that sprung up the last five years. You send in your gold and silver jewelry or junk or whatever and receive credit on the exchange (minus an appraisal fee and other fees, most likely). The exchange facilitates trading between grams of gold, grams of silver, and units of cryptocurrency. When you want to withdraw gold or silver the exchange would probably permit doing so in defined units such as nationally minted bullion coins or silver rounds. Again, likely minus a fee for shipping, insurance, security, etc.
Somebody please make this happen!
Sometimes I want to cry thinking of how great the world would be if all of this could be done and how it isn't likely to happen anytime soon and I may not live to see it.