WOW Insider's column on addons profiles XLoot today. XLoot makes your interface prettier. Depending on how much of a visual person you are, I can see this might make your UI look less cluttered or might give you visual clues to things. Note that there are plugins to add functionality although one is rumored to not be working.
http://www.wow.com/2009/06/20/addon-spotlight-xloot-and-friends/
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