Question: where are the zeppelins in orgrimmar?
Answer: Horde Zeppelins Edit on the plateau (just north of the flight master) in the center of Orgrimmar (before Cataclysm there used to be a docking tower outside Orgrimmar in Durotar). The one that leaves from the west edge of the tower will take you to the Undercity; the east side goes to Grom'gol in Stranglethorn Vale.