Simple delivery. Just take the flight from Splintertree to Zoram'gar Outpost and you're all set.
My results:
You gain 2000 experience.
Your reputation with Darkspears Trolls has increased.
But if for some reason you "haven't" visited Zoram'Gar outpost... you need to go all the way to the west coast of Ashenvale. There is a small outpost on the beach w/ a multi-tude of quest givers, plus of course the Wind Rider guy.