[Lavina]

Mokshah, the thought is most appreciated.. I think...

TargetDoc, Sandmann, the listed numbers are indeed only the innate threat values. Devastate has an additional damage component that should be taken into account. The damage component will make Devastate superior to Sunder Armor, unless you're using grey weapons.

[chin_god]

You have said that the thunder clap is only for battle stance, this is currently untrue. I just recently respecced to prot from Fury dps (and arms before that) so it may have been a change as of 2.4...not sure...however I have been doing the off tank thing since about mid January and I have used it since then (at least my memory tells me I have). And now as a prot warrior I use it often.
The guide is great for me as I am just now getting the hang of tanking and this helps me figure out what I need to do. So far, I have just been spamming devistates and throwing in an occasional revenge or concussive blow. This works....but about 10% of the time I lose aggro when it isn't the other players over doing it...seeing the cycles above will definately help me