n'haaz-aua
Explorer
It should also be available at PAX - I look forward to running this event and seeing some hardcore DS fans get the very sweet cloth map!
That's good news! Hopefully other cons also.
Some spoiler free tips on the arenas: have fun with it and work the crowd because there is glory to be had. don't do the arenas in order. make your own character to bring, the pregens are so-so. use classes that aren't reliant on dailies, or who have dailies that last all encounter. 2 defenders and 2 healers didn't hurt in the tough ones. try not to die

With the exception of one that was sickeningly hard, they are really well done and have a great sense of the game world, its not just a regular cookie cutter arenas. I would highly recommend playing in it, its worth your time.