World of Warcraft Quests involving Ambassador Ardalan:
Alterac Valley Horde Quest
Fallen Sky Lords (Horde) Find out what became of Wing Commander Guse, Wing Commander Jeztor, and Wing Commander Mulverick. Return to Commander Mulfort should you complete your mission.
Blasted Lands Alliance Quest
Petty Squabbles - (Step 1) Speak with the Fallen Hero of the Horde at the border of the Blasted Lands and the swamp.
Teldrassil Alliance Quest
Ursal the Mauler Kill Ursal the Mauler and return to Athridas Bearmantle in Dolanaar.
Eastern Plaguelands Alliance & Horde
When Smokey Sings, I Get Violent Travel to Plaguewood, northwest of Light's Hope. Destroy 8 Scourge Structures by using Smokey's Special Compound at the Mark of Detonation planted inside each building. Smokey has had the Ziggurats and Slaughterhouses marked.
Once you plant the bomb, leave the building and marvel at your handiwork.
By the way, Smokey's Special Compound is rather... unstable.