05-16-2006, 01:22 PM
Cache of the Firelord can be looted by anyone standing beside it. The DM Tribute and the Chest of the Seven in BRD work the same way. I had my druid get summoned in to pick up the Impervious Giant from BRD a while back.
Also, I can confirm you'll be raid-locked. I go back from time to time to fill in an 11th hour slot for my old raiding guild on Magtheridon and everytime I step through the portal I get "You are now saved to this instance".
I hope it drops for you soon, though!