While initially being very supportive of the bootstrap-bitusd-through-OB idea, due to recent developments and the merging of all DACs, I think it's better to focus on core development of bitshares, and then wait and see what OB turns out to be. If it turns out to be a massive hit, then we can spend our own resources on integrating bitUSD, and the issue shares to airdrop bitUSD on the OB userbase. If itsn't that quick to gain traction, we could instead choose the most promising devs it has and hire them to create our own bazaar system powered by bitshares.
It could run with bitcoin, bitUSD and BTS ensuring the bitcoiners will not go crazy and attack us for "stealing" their developers, since the improved bazaar would still have bitcoin integration. The added benefits that a DAC gives the bazaar system will likely make it grow incredibly fast, we could even issue BTS to pay for real world advertising for the initial sellers on the system, to help kickstart adoption. If bitcoiners saw first hand just how much bitshares is able to contribute positively to decentralized systems, and in this case even contribute to bitcoins utility, they will probably have an easier time getting over always attacking altcoins and bitshares.