We already discussed it here, now is out @ http://mercuryex.com/
Quoting a r/Bitcoin comment to slow down enthusiasm :
First thing, this is a decentralized crypto to crypto exchange. So no fiat. That’s the fault of the OP, the author of the project makes it pretty clear its crypto to crypto only.
and there 
I see space for NuBits for integration and proxy fiat.
Second, its not a “fully” decentralized exchange at all because the order book and matching engine is on a centralized server ( you DDOS that server, you can’t trade).
What is decentralized is the settlement portion of the exchange, which is nice since it means that you don’t have to deposit your coins in a exchange controlled address, meaning that a hacked exchange doesn’t compromise your coins. Unfortunately, this relies on what’s called a “Atomic Cross Chain Transfer” which relies on there being no transaction malleability (yes, the same thing that mt. gox claimed to have suffered).
This is not ready at all for prime time, and may never be ready with this kind of architecture. I think most core developers will tell you the same thing about any project that relies on transaction malleability to not exist. So use at your own risk.
Thoughts? Anyone fancy asking for some grants for integrating NuBits?
