For my reference:

WotLK Leatherworking:

* Jormungar Leg Armor- Permanently attach jormungar armor onto pants to increase Stamina by 45 and Agility by 15. Can only attach to armor in your possession, and attaching causes the item to become soulbound.
* Nerubian Leg Armor - Permanently attach nerubian armor onto pants to increase attack power by 60 and critical strike rating by 15. Can only attach to armor in your possession, and attaching causes the item to become soulbound.
* Jormungar Leg Chitin - Permanently attach clefthide armor onto pants to increase Stamina by 50 and Agility by 18. Can only attach to armor in your possession, and attaching causes the item to become soulbound.
* Nerubian Leg Chitin - Permanently attach nerubian chitin onto pants to increase attack power by 70 and critical strike rating by 18. Can only attach to armor in your possession, and attaching causes the item to become soulbound.
* Borean Armor Kit - Permanently increase the Stamina of an item worn on the head, chest, shoulders, legs, hands or feet by 12. Can only be used on armor in your possession, and attaching the armor kit causes the item to become soulbound.
* Heavy Borean Armor Kit - Permanently increase the Stamina of an item worn on the head, chest, shoulders, legs, hands or feet by 15. Can only be used on armor in your possession, and attaching the armor kit causes the item to become soulbound.
* Dragonscale Leg Armor - Permanently attach dragonscale armor onto pants to increase Stamina by 72 and Agility by 35. Can only attach to armor in your possession, and attaching causes the item to become soulbound.
* Protoscale Leg Armor - Permanently attach protoscale armor onto pants to increase attack power by 100 and critical strike rating by 36. Can only attach to armor in your possession, and attaching causes the item to become soulbound.
* Drums of Great Battle - Increases movement speed by 15% and haste rating by 95 on nearby party members. Lasts 30 sec. Drums can be used while shapeshifted.
* Drums of Major Restoration - Restores 144*5 health and mana to nearby party members over 15 sec. Drums can be used while shapeshifted.
* Drums of Dark War - Increases attack power by 75 and spell damage by 44 on nearby party members. Lasts 30 sec. Drums can be used while shapeshifted.
* Drums of Precision - Increases hit rating by 95 on nearby party members. Lasts 30 sec. Drums can be used while shapeshifted.

It will no longer be possible to chain the effects of drums from multiple people. (Tinnitus - 2m debuff)