For a tank, I'm a good warlock(my main). In my guild, there seems to be a much greater need for a tank than DPS, so I'm slowly converting. As far as I can tell, I'm ok for an end of Kara tank, and really just need a few items (Aran ring, Illhoof or Prince cloak). Any obvious suggestion? I especially need options for enchants and trinkets(yes I have the Moroes watch, I was pvping last night).
Gladiator Plate shoulders are the best you can get until you get T4.
They beat the pants off the blues because of the massive hp/ac advantage even though the stats aren't ideal for tanking.
Of course if you don't have the defense to be uncrittable without the blues, by all means use them. Of course the S1 shoulders have resilience, which helps with uncrittable but not with avoidance like defense.