I play WoW and i've never seen a cloudsong, Ihave played thru 60 level, and gone to a lot of place, but i didnt do most of the "end game" and hardcore instances.
I dont know what the heck it is, i ran a search on alla and it found nothing, however thottbot states that it's an NPC but hey thottbot is most likely never accurate.
Maybe it's from a illegal hacked free server and it's a fake item, but imo, the whole thing is faked if not.....he needs a psychiatrist! (whatever you spell that) Maybe put it up on the WoW forums to see what people say? :x