My dress code at work is business casual and my fave article of clothing for such a dress code is the cardigan - the ultimate layering essential, IMO.
This one by Gap is so cute - especially those little buttons on the cuffs!
Gap - The new V-neck cardigan - $44
I want one in every color, though I think I'll have to settle for just adding 1 or 2 to my wardrobe. I'm feeling the black and turquoise colors.