Jan 31st 2011 8:23PM @Cragdog: An addon I used in the late stages of WotLK is Droodfocus. (Currently not using it, since I'm working on my UI) It's a small applet ingame showing icons with their duration for SR, FF, Mangle, Rip and Rake, aswell as an energy bar with combo-points embedded on it. It also shows some cooldowns, and is highly configurable if one should desire it.
Not only does it show your kitty buffs and debuffs, but when switching to bear it also shows specific buffs/debuffs and rage for that.
It's downloadable from Curse at the following link: http://wow.curse.com/downloads/wow-addons/details/droodfocus.aspx