Most people asked me about the slides for the presentation in Shanghai Graphene DevCon. Sen some by private but here it is the link for people that wan to check that out:
https://github.com/oxarbitrage/worker-proposals/blob/master/devcon2.pdf
Link is he exact slides presented, please note they are not complete or fully accurate, lo of stuff had to be removed to make it simpler.
You can check the progress on how this escrow contracts are being implemented in bitshares here: https://github.com/bitshares/bitshares-core/pull/866