I should add that this system doesn't compete with SR or put it out of business. There would be a need for escrow services. Would you trust Atlantis Escrow Service or Silk Road Escrow Service? People trust DPR and gang. They would get plenty of business as escrow agents for the decentralized market. The difference is that they wouldn't know about the contents of the 95% of transactions that complete successfully (although they would still get paid for overseeing them), so the buyer and seller are safer. Even DPR would be safer, since he wouldn't be a central target, storing all the info. He would only know about 5% of the transactions. The rest would exist anonymously in a database that anyone could inspect already.