http://forums.worldofwarcraft.com/thread.aspx?fn=wow-interface-customization&t=35872&p=1&tmp=1#post35872
A good move for any healer or pet class. Otherwise, you can probably ignore it unless you want your tactical ability to be that much more refined. :D
Hmmm, this would be very handy for me, especially if Koryn were to have the addon as well. Then it would be easier for me to buff/heal during fights.