How Cata changed Warrior Tanking

[shieldmaidenjen]

Hi all! I tanked on my warrior through BC and most of Wrath of the Lich King but switched to dps once my raiding guild died a fiery tragic death towards the beginning to Cataclysm. So I know squat about the tanking changes. Now I don't really plan on tanking Cata normals and heroics but it's possible I might need to tank some of the older BC and ICC raids that my awesome new guild do for fun - I want to be avaliable for my guild if a tank is needed for older content like ICC (and heck, if I enjoy it, maybe I'll work up the courage to try Cata dungeons).

So. How has warrior tanking changed since Wrath? Any personal opinions on it, warrior tanks? Has it gotten better? Worse? Do you have some links for me on rotation if that has changed? I want to make sure I can hold aggro like a pro even on the older stuff.

Thanks! <3

EDIT: Here is Idis in her prot gear. Some of it be very old. >>
http://us.battle.net/wow/en/character/wyrmrest-accord/Idis/simple