All right, when this was posted, August was just put to bed. Still if you are going to do something for the holidays, you might want to start now.
37signals.com has a good selection of suggestions, tutorials, and links the will help you decorate your site. Elves are extra.
37signals is here to help. In these pages you'll find dozens of ideas for improving the holiday customer experience at your site. Each idea is accompanied by examples taken from top retail sites (we've visited hundreds of sites over the past two holiday seasons seeking smart techniques).