YellowGoat sells all sorts of whimsical jewelry on her Etsy site. I personally am a fan of her headpieces and keepsake rings. I think the humor as well as the simple clean look of her pieces.
But if you are looking for a holiday gift idea, check out her sterling silver Christmas Card necklaces which come in a selection of styles from the gingerbread man shown here to Christmas trees and snowmen.
Also, check out her blog here.