8/17/12 Update: According to the dungeon journal, it looks like the Sha of Anger will drop the mount Reins of the Heavenly Onyx Cloud Serpent.
|Click image to Enlarge|
|NPC affected with Rage of the Sha|
I also have video footage of each spawn point, and you can get an idea as to just how far away you can target this boss.
|Both Spawnpoints east and west of the Burlap Waystation|