Im not sure if this has already been posted but I will post it anyways.
~~~~> Valid for 2.3.2 <~~~~
1 - Coming from the Durotar zep towards org about ~25 meters you will see a slanted hill.
http://i255.photobucket.com/albums/h...2008/Step1.jpg
2 - Climb up that hill and you SHOULD be on a little hill with a giant wall 10 meters or so High.
http://i255.photobucket.com/albums/h...2008/Step2.jpg
3 - Angle yourself at the wall and start wall jumping at a 30ยบ ish angle ( the wall is north )
4 - Then you should be on another ledge. Again facing to the north --- Wall jump untill you get up.
http://i255.photobucket.com/albums/h...2008/Step3.jpg
5 - Now run to the west a few meters ( ~5 ) and you SHOULD be on the orgrimmar gate
http://i255.photobucket.com/albums/h...2008/Step4.jpg
6 - Run across the planks hanging out from the pillar at the end of the wall to the west and once u get to the other side aim at the very corner of the plank and ledge and stand 2 meters back.
http://i255.photobucket.com/albums/h...2008/Step5.jpg
7 - Run and jump untill you hit the hidden ledge and then jump again up
Walla! Your on top of the org Gate house. Sorry about the crappy grammar and english. Take care!
http://i255.photobucket.com/albums/h...2008/Step6.jpg