I don't think it is worth mining now !
I hear you can pull 10 coins a day with an avarage rig, at a price of 0.50$ (which is less then what it is at the time i am writing this) you would pull 5 dollars a day, 150 dollars a month.
So in my op8inion enough to profit slightly after the electricity costs. Compared to anything else it's not worth it, but if you think it might rise one day... why not. I'll point one good card at it for sure if price stays around about where it is now.
Is it listed in any good exchange?
Not good really. Cryptopia has it and is alright I think. Works fine, wouldn't leave funds hanging in there any longer then I must though- I've no idea about the devs credibility.