I picked one up. Currently, I have The Black Heart & the 126 dodge rating / armor on use trinket from Heroic 10 man Trial of the Crusader. My guild had really bad luck with tanking trinkets -- only 1 Heart of Iron and 1 of the 155 stam + parry trinkets from 10 man.
I won't use the 170 stam trinket in most fights, I have 36.5k unbuffed health right now. However, it'll be nice to have something to swap to for magic damage fights, where something like the dodge+armor trinket are useless.
"Sometimes attaining the deepest familiarity with a question is our best substitute for actually having the answer." -- Brian Greene.