As Many of our fellows have either hit the magic '70' or heading there at a pace. I decided to post a liitle information on Attunements for the TBC dungeons. Some of you have most probably started these and know what you are doing. But Hey, its a break from work :P

Attunement guide

Black Temple still to be advised 

Hellfire citadel
Shattered halls Key – requires level 70

Quest starts by killing quests that start by killing a blacksmith named Smith Gorlunk in Shadowmoon Valley – outside the black temple (66,38). He will drop an item that begins you on a quest series that will end with the Shattered Halls key as the reward.

1)Entry Into the Citadel - take the key mold to Force Commander Danath Trollbane in Honor Hold.

2)Grand Master Dumphry – Take the key mold to master blacksmith Dumphry in Hellfire Peninsula (51,60)

3)Dumphry's Request – Bring required items to Dumphry – 4 X Fel Iron Bars, 2 X Arcane Dust, 4 X Motes of Fire.

4)Hotter than Hell (group). Destroy a Fel Reaver in Hellfire Peninsula and plunge the Unfired Key Mold into its remains. Bring the Charred Key Mold to Dumphry in Honor Hold
Reward = Shattered Halls Key.

Auchindoun.
Shadow Labyrinth Key

To obtain access to the Shadow Labyrinth you’ll have to slay the final boss in Sethekk Halls, Talon King Ikiss to obtain the Shadow Labyrinth Key. The Shadow Labyrinth door is also possible to be picked by a rogue with 350 lock picking.

The Arcatraz
The quest chain can be started by Gahruj in Netherstorm (46,57), This NPC gives around 7 quests, which need to be completed. He will then give you :-
1)Special Delivery to Shattrath City - Deliver the Ata'mal Crystal to A'dal on the Terrace of Light in Shattrath City.

2)How to Break Into the Arcatraz (Dungeon) – Recover 2 parts to the key. One half is possessed by an ancient in the Botanica known as Warp Splinter. The other is held by Pathaleon the Calculator inside the Mechanar, I believe you are rewarded with the key at this point.

3)Harbinger of Doom (Dungeon) - You have been tasked to go to Tempest Keep's Arcatraz satellite and slay Harbinger Skyriss.

Karazhan – requires level 70
Getting attuned for Karazhan takes a lot of group effort. If starting from scratch you will need to complete 8 instances. The instances (in chronological order) are:
•Sethekk Halls
•Shadow Labyrinth
•Steamvault
•Mechanaar
•Botanica
•Arcatraz
•Old Hillsbrad
•Black Morass
When you reach level 70 you’ll need to go to back to Azeroth and to the Karazhan dungeon located in Deadwind Pass. Once there you will see a quest npc that will give you two quests. The more important of the quest is Arcane Disturbances.

1)Arcane Disturbances - Use the Violet Scrying Crystal near underground sources of water in the Master's Cellar and return to Archmage Alturus outside of Dalaran.

2)Contact from Dalaran - Bring Alturus's Report to Archmage Cedric in the outskirts of Dalaran.(hillsbrad 20,63)

3)Entry into Karazhan - Travel to the Shadow Labyrinth and in the final room you’ll find the first key fragment along the wall

4)The Second and Third Fragments –
Second Fragment – Steamvaults, the fragment is found in the bottom of the pool of water near the first boss
Third Fragment – Arcatraz, the fragment is found past the first boss, up the stairs and in the room with the Void Walkers

5)The Master’s Touch - Find Medivh in the Black Morass in the Caverns of Time

6)Return to Khadgar - Go back to Shattrah and talk to Khadgar

Tempest Keep
The Eye
Everyone needs to complete the quest series and earn the key to become attuned to The Eye and be allowed in. The process to obtain the Tempest Keep Key is staggering. You’ll first have to complete a very long quest chain starting in Shadowmoon Valley. There are a handful of pre-requisite quests starting mainly at the Alter of Damnation with possible pre-reqs linking from Shadowmoon Village (Horde) or Wildhammer Stronghold (Alliance).

Eventually you’ll talk to a quest giving NPC named Oronok Torn-Heart (54,23) which will continue the series for over a dozen more quests coming from he or his sons.
Once the quest line finishes out and you’ve killed the Firelord you can travel back to Shattrah City where you will get 3 quests requiring you to complete instances on Heroic Mode. These instances include Shattered Halls, the Steamvault, Shadow Labyrinth, and the Arcatraz.

Once these 4 instances are completed on heroic mode then the 3 quests are completed and you will earn your Tempest Key.

Heroic Mode Keys
•Hellfire Citadel Heroic Mode requires the Flamewrought Key, sold by the Honor Hold Quartermaster when you are revered with Honor Hold.

•Heroic Mode requires the Reservoir Key, sold by the Cenarion Expedition Quartermaster when you are revered. The entire party needs this key in order to play the dungeon in Heroic Mode

•Heroic Mode requires the Auchenai Key, sold by the Lower City Quartermaster when you are revered. The entire party needs this key in order to play the dungeon in Heroic Mode.

•Heroic Mode requires the Warpforged Key, sold by the Sha’tar Quartermaster when you are revered. The entire party needs this key in order to play the dungeon in Heroic Mode