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It's all in the FAQ.
"This is why we do not give out any specific release dates, as even we don't know when we will be ready with a release."
The area with the Bridge of Khazad-Dum is called Second Hall. Khazad-Dum, Dwarrowdelf and Moria are all the same things, especially the first two, as Dwarrowdelf is just the English translation of the Dwarvish name Khazad-Dum.