New wands and guns will feature in Zul'Aman and Zul'Gurub.
I haven't been able to find anything else on this other than they probably will be item level 353 epic items. That will rock for dwarf hunters. I'd retire my Themios the Darkbringer in a sec for a good gun.
EDITED TO ADD:
The updated version of the Gurubashi Dwarf Destroyer is suckage tank crud: Gurubashi Destroyer.