Camel mounts

Camel mounts are available as a new ground mounts in World of Warcraft: Cataclysm. Obtaining one will award the achievement One Hump or Two?.

Faction reputation
The following camels are sold by for, provided that you are Exalted with the Ramkahen:

Rare mobs
The Grey Riding Camel is a guaranteed drop from Dormus the Camel-Hoarder:

Promotion
Explorer's Dunetrekker is a reward for Recruit-A-Friend.

Trading Card Game
The White Riding Camel is available from the Tomb of the Forgotten TCG expansion set, redeemed with Landro Longshot in Booty Bay.