Lowcountry Low Roller
Out of interest, why do you say this? I just ran my group through Greenest in Flames, so I'm a fair way away, but I know that Steve Winter said he wanted to let the players get the masks, while WotC were resistant to that idea.
My group also has the black dragon mask. They've mostly used it to bluff their way into places. It's not been tremendously game-changing IMHO.