http://www.notbeinggoverned.com/metamarket-whitepaper/ METAmarket uses two party escrow directly between buyer and seller with no third party. In our system the buyer and vendor agree to a dispersal ratio beforehand using a time-locked multisig bitcoin refund transaction. This, in addition to the federated reputation system, ensures both parties have an economic incentive to complete the transaction without the need for a trusted 3rd party. WW