Updating the notion of peace gets my vote anytime of day. I love these cute heart-shaped earrings and finger rings from Urban Outfitters that feature the old CND peace symbol.
Originally, the CND signs were used by the Campaign for Nuclear Disarmament in Britain as part of the British nuclear disarmament movement. They were later adopted by the counterculture and the hippie movement.
Making peace jewelry at the present moment is understandable--we need peace now as ever. And peace is a concept that will never go out of fashion, at least as long as the human race is caught up in selfish interests and not for the better of all living things. So I say make a fashion statement and put the peace symbol on!