*Jawdrop!*

[Fallacy]

Weapons and armor you get to exclusively use for the Kael'Thas fight:

http://wow-en.curse-gaming.com/gallery/details/22356/kaelthas-encounter-weapons/

Just plain godly.

[Darkweald]

Have you seen the Artifact (http://wow.allakhazam.com/search.html?q=azzinoth)?

[Lupen]

Azzinoth has been in the game since beta, it has yet to be confirmed as a true drop from the Big Guy.