While checking out the beta forums for new information and patch details for the wiki, I ran across some information from Daelo, the Lead Encounter Designer for the expansion. Although beta players can see this already, I thought you all might like to see an updated status on the new instances coming out with the xpac. So, without further ado, read on for the latest in dungeon details:
CoT Stratholme (80) - Disabled due to bugs
Azjol-Nerub (72-74) - Disabled due to bugs
Halls of Lightning (80) - Halls of Lightning is currently disabled and cannot be reached. It will open up in a future beta patch.
The Nexus HEROIC (80) - The Nexus is the first implementation of a Heroic Difficulty dungeon in Wrath of the Lich King. The Nexus is located in Borean Tundra. You must be level 80 to enter but there are no other requirements currently.
Utgarde Keep (70-72) - Open for testing. Gundrak (76-78) - Gundrak is a level 76-78 dungeon at the northeast corner of Zul'drak. Some elements of the dungeon are not final such as loot, but they wanted to get this on the beta as early as possible to begin getting bug reports and feedback.
The Oculus (80) - Initially working but non-level 80 ghosts were unable to zone back in. This has been resolved. Level 75+ player ghosts can now zone back into the Oculus by moving to where the Orb of the Nexus is located.
The Nexus (71-73) - Overall damage toned down some for the mobs. However, for Ormorok the Tree-Shaper, his Crystal Spikes attack do no damage currently. Under investigation from the design team.
Halls of Stone (77-79) - Halls of Stone is a level 77-79 dungeon in northern Storm Peaks. Halls of Stone is currently disabled in this beta patch. It will return in a future beta patch.
Utgarde Pinnacle (80) - Yes, King Ymiron drops loot this beta patch!
Drak'Tharon Keep (74-76) - Open, however, during the last boss you may be unable to battle rez group members and may receive a "Your Target is Dead" error, forcing them to have to run back.
Ahn'kahet (73-75) - Ahn'kahet: The Old Kingdom is a level 73-75 dungeon in Dragonblight. Some elements of Ahn'kahet are not complete such as loot, but they wanted to get this to beta as early as possible to begin getting bug reports and feedback.