Ulduar is a raid dungeon in the titan complex of Ulduar which is located in the Storm Peaks. It serves as the prison of the Old God Yogg-Saron as well as the current residence of most of the titanic watchers who have fallen under its influence.
What took us so long? Well the answer to this is quite simple. We did not have the mechanics ready for this instance to be opened without problems. It required a lot of work, rewrites and a lot of new code which we processed and validated and made public as always because the true experience is always achieved with the community and experienced developers who can help and make it as blizzlike as possible.
Now we are ready. We are also ready for your bug reports if there will be any which we will try to eliminate quickly and according to official servers as always. We don't skip or auto-complete things. We fix them properly for more than 12 years already!
This is one of the promises we made before the new website and now we deliver the promise.
Good luck and have fun!