I just started searching for Christmas ideas today actually. My studio opened last year at the end of Nov beginning of December. I did some Christmas shoots, but for the most part, I missed Christmas season. I was considering using the same set up from last year since I didn't do a whole lot of pictures from it in '07.
I had a canvas background that looked like the inside wall of a house with a snow scene out the window. It came to the floor and then I put down the sticky vinyl hardwood floor looking tiles. I covered most of it with a cream colored rug and set up a decorated Christmas tree with presents underneath. I also had a big basket full of poinsettas for the opposite side of the tree.
I'll see if I can find a picture and post it...