More to explore:
Beautiful Circle Shrugs - many patterns with charts. #crochet #shrug
Circular crochet Bolero with charts
Bolero out of the circle, free pattern in Russian, so you'll need to translate, although there is a very good diagram pattern to follow.
Gorgeous circular crochet Vest Free Pattern
Looks like a quick hooking project that could result in a really versatile and modern piece.
Sacos circulares | Mi Rincon de Crochet
Chalecos | Mi Rincon de Crochet
Tapados Circulares | Mi Rincon de Crochet