Just a quick note that the Frost/Unholy DK Pre-Raid Gear Guide has been updated with 4.2 information. Justice Point ilvl 359 gear, Firelands Bind on Equip stuff, Avengers of Hyjal reputation items, and gear purchased from the three Molten Front vendors have all been added.
PVP gear has NOT been added because it's all weird and I'm going to wait until the new PVP season to be sure about what's what.
Also, there is still no gear listed from Blackwing Descent, Bastion of Twilight or Throne of the Four Winds (except BoEs) because those are raids.
Incidentally, take look at this trinket you can buy from one of the Molten Front vendors:
You can THROW A CABER. How cool is that?
And look at the buff you get when it procs!
I haven't really compared what each of the Molten Front vendors sell yet, but really - do I even have to look at the other guys? CABER THROWING.