If it's free, do a Christmas-themed doohickey:
* New prestige class (for elves).
* New good-aligned artifacts for people giving away stuff.
* New cursed magic item: Fruitcake.
* Adventure based on the film of the same name: Santa vs. the Martians. And orcs.
* Adam Sandler reference.
* Recipe for orc holiday pie.
Too bad Modern d20 isnt' out yet. Then you could have done a Halloween Shopping Mall of the Dead adventure.
Cedric.
aka. Washu! ^O^