I took a few hours to look everything over and there are a few feasibility issues. I made a post going over it all https://steemit.com/utopian-io/@travelersmemoire/an-openbazaar-steem-integration-feasibility-report. Please keep in mind I'm no crypto expert and am hopefully wrong about the best way to go about this. Maybe @swapsteem has a better handle of it all.