IDEX is like EtherDelta although have some better features. I hope this help this project because a good project need a good exchange to take its chances. Good news anyway.
Idex is well designed, but Etherdelta is gaining more users, and I think many prefer to use it. I particularly prefer Etherdelta. But the two are good economic options for trading.
Etherdelta has a lot of technical trouble right now. It doesn't work very well since a few weeks now, but I hope they can fix those problems soon. Anyway, it would be good to see AUN on another high volume centralized exchange.