Set for warrior

Tanking set for warrior - pre-karazhan;

Non-heroic:
Head: "Greathelm of the unbreakable"
Shattered Halls (Grand warlock Netherkurse, 71E)
Legs: "Greaves of the shatterer"
Shattered Halls (Warchief Kargath bladefist, 72E)
Chest: "Jade-skull Breastplate"
The Mechanar (Nethermancer Sepethrea, 72E)
Hands: "Thatia's selfcorrecting Gauntlets"
The Arcatraz (Dalliah the Doomsayer, 72E)

Heroic:
Waist: "Lion's Heart Girdle"
Hellfire Ramparts ( Nazan 62-72E )
or
"Girdle of the Immovable"
The Slave Pens ( Quamirran 62-72E )
Boots: "Boots of the Collossus"
Mana-Tombs ( Pandemonius 66E )
Shoulders: "Fanblade Pauldrons"
Auchenei Crypts ( Shirrak the dead watcher )
Hands: "Thatia's Selfcorrecting Gauntlets"
The Arcatraz ( Dalliah the Doomsayer )

Best regards
Sweetdeath

I´m no expert - but hope it will be helpful to you guys ( punchbags )
Head: http://www.wowhead.com/?item=27520 (Greathelm of the Unbreakable)
Legs: http://www.wowhead.com/?item=27527 (Greaves of the Shatterer)
Chest: http://www.wowhead.com/?item=28262 (Jade-Skull Breastplate)
Boots: http://www.wowhead.com/?item=27813 (Boots of the Colossus)
Shoulders: http://www.wowhead.com/?item=27847 (Fanblade Pauldrons)
Gloves: http://www.wowhead.com/?item=28390 (Thatia's Self-Correcting Gauntlets)
Bracers: http://www.wowhead.com/?item=27459 (Vambraces of Daring)
Waist: http://www.wowhead.com/?item=27672 (Girdle of the Immovable)

If you want some fast tank gear that you can replace with epics, get the felsteel set.

With tanking you have to remeber that you have to hit them hard aswell, not just being the best a dodgeing or missing. getting hit is a good thing (not for healer) I think it is a good idea to have maybe 2 iteams on you that are pvp to give you more crit and not forgetting HIT RATING!

I must stress that hit rating is very important. if you are tanking or dps in Kara and you have 0 hit rating, then dont bother signing up. u missing about 5x in a row you will whipe the grp. there are iteams out there from quests and instance that give you good def rating and hit rating