I think its a cool project. I thought its interesting as they will be the main competitors to ShadyBay/ShadowBay and they offer interesting insight into how to solve some of the problems of a decentralized marketplace. In the end Shadow may have a competitive advantage because of the extra privacy and anonymity it offers buyers and sellers, but Shadow also has to compete against Bitcoin's network effect.
Also wondering if Sbay will have multi-signature involved at some point. That seems like an important piece of the puzzle.
OpenBazaar is a very interesting project indeed!
One thing the team (working on Shadow Market) may need to consider as they prepare to release this to the public is how much liability they want to take on by hosting the decentralized marketplace. Being the operator of a point of sale destination that potentially has illegal paraphernalia being sold on it now has a legal precedence in the eyes of at least one government. https://www.cryptocoinsnews.com/ross-ulbricht-convicted-running-silk-road/
Also, I assume they are implementing a multi-sig / trustless escrow system.
Really good points, I actually think this is really different though... Being that SDC devs are not really hosting anything. They are just writing code that we the public are using how we see fit. There is no 'centralized' hosting of SDC or Shadybay (terrible name) The SDC team literally has no control over how the network operates nor do they physically supply the network with a hardwired location as far as I can tell. The other market places had been very much traditional models of "I have a web hosting account and I am going to write this market place, then host it and collect fees". I think this is really different. I'm really excited for all the legitimate uses of a amazing decentralized marketplace. I have no use for illicit goods or services. However I could sell computer hardware and sports bottles.