At a guess, after looking quickly at your gear using wow-heroes.com:
Naxx 10/25, OS 10/25, EoE 10/25, Ulduar 10/25.
However: you're missing some enchants, your prot spec doesn't look all that good, and the mish-mash of gear ranging from ok to awful (that mushroom trinket) might make some people hesitate to bring you along.
There's a prot warrior tanking guide around here someplace, and some other info stickied here in the forums that you will find useful.
There are many that know far more about warrior tanking then I, but your spec really needs some work. Others will correct me, but this is probably closer to where you want to be with a Deep Wounds spec. There are two points left and I've seen them put into Cruelty or Shield Specialization or Improved Disciplines; you can kind of do with them what you will. Also, I've seen the points in the Arms tree moved around, but the goal is to get down to Deep Wounds.