It's no great secret, but you can swap Shamen into a high DPS group from a low DPS group to give them bloodlust, at least until WotlK comes out. It's more use than some things there in any case.
EDIT: The Light of Elune (
[Light of Elune]) is a Divine Shield in a bottle that is available to the alliance, and only to the alliance. You can only ever get one per character, so don't squander it.
Further Edit: I've read back and seen that the Light of Elune is mentioned before in this post. Sorry for repeating it.