Silver War Talbuk

As no doubt the comments on the actual item [item=29229] will tell you. This mount is obtained in Outland - Nagrand by becoming exalted with the [faction=978] faction.

As a result of this the mount is quite a rarely seen sight, mainly due to the fact that most players use flying mounts now anyway, but secondarily because not a large amount of players have gone for being exalted with Kurenai.

There are 7 other Talbuk mounts available by gaining exalted with the [faction=978] faction:

[item=29227]
[item=31832]
[item=29230]
[item=29231]
[item=31836]
[item=31834]
[item=31830]

There is also an additional two other Talbuk mounts (do not require exalted with Kurenai) that can only be obtained by PvP and looting of mobs:

[item=28915]
[item=29228]