Found this on the wow forums.

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Here's a breakdown of the BC Dungeon Maps. There are fifteen 5 man dungeons in 5 different regions. Each has a different level requirement and most require you to complete the previous instance in that area for attunement purposes.

Time & Loot

It will take around 30-120 minutes to do any given dungeon (and can take much more time if you're not organized). Each boss can drop one or two blues (and on rare occassion, purples). In the beta there were no Bind On Equip blues or purples found in the dungeons and Dungeon Set 3 was not in the loot tables. Dungeon set 3 is rumored to appear in the level 70 dungeons.

Reputation Gain

The lower level dungeons (pre-level 70) will give you reputation with that area's faction up to honored (on monster kills). The level 70 dungeons will allow you to progress to exhaulted off monster kills.

Heroic Mode

Badge of Justice tokens drop off specific bosses in Heroic mode. You can then use the badge of justices to turn-in to a vendor for epic loot. The loot can vary from epic armor and weapons to epic armor with fire resistance of 35-60 on each piece. Most Badge turn-ins for loot are between 20-50 badges per item.

Hellfire Citadel - Hellfire Peninsula - Honor Hold Rep
- Hellfire Ramparts - http://www.ampwow.com/wow/viewnewzones/Hellfire+Ramparts.php!default=map
- Blood Furnace - http://www.ampwow.com/wow/viewnewzones/The+Blood+Furnace.php!default=map
- The Shattered Halls - http://www.ampwow.com/wow/viewnewzones/The+Shattered+Halls.php!default=map
- Magtheridon's Lair (25m Raid) - n/a

Coilfang Reservoir - Zangarmarsh - Cenerion Expedition
- The Slave Pens - http://www.ampwow.com/wow/viewnewzon...Slave+Pens.php
- The Underbog - http://www.ampwow.com/wow/viewnewzones/The+Underbog.php!default=map
- The Steamvaults - http://www.ampwow.com/wow/viewnewzones/The+Steamvault.php!default=map
- Serpentshrine Cavern (25m Raid) - n/a

Auchindoun - Terokkar Forest - Consortium, Lower City Rep
- Mana Tombs - http://www.ampwow.com/wow/viewnewzones/Mana-Tombs.php!default=map
- Auchenai Crypts - http://www.ampwow.com/wow/viewnewzones/Auchenai+Crypts.php!default=map
- Sethekk Halls - http://www.ampwow.com/wow/viewnewzones/Sethekk+Halls.php!default=map
- Shadow Labyrinth - http://www.ampwow.com/wow/viewnewzones/Shadow+Labyrinth.php!default=map

Tempest Keep - Netherstorm - Sha'tar Rep
- The Mechanar - http://www.ampwow.com/wow/viewnewzones/The+Mechanar.php!default=map
- The Botanica - http://www.ampwow.com/wow/viewnewzones/The+Botanica.php!default=map
- The Arcatraz - http://www.ampwow.com/wow/viewnewzones/The+Arcatraz.php!default=map
- The Eye (25m Raid) - n/a

Caverns of Time - Tanaris - Keepers of Time
- The Escape from Durnholde - http://www.ampwow.com/wow/viewNewZones/Old+Hillsbrad+Foothills.php!default=map
- Opening the Dark Portal - http://www.ampwow.com/wow/viewNewZones/The+Black+Morass.php!default=map
- The Battle for Mt. Hyjal (25m Raid) - n/a

Add any dungeon-specific information that you find relevant, please post.