I was browsing the web and came across this site with some nice cross stitch patterns to download for free. You can find the list of free charts here:
http://shopping.originpublishing.com/charts_category.asp?category=5
This is just one of the cute ones you could do up as a nice Christmas card.
And here is the link:
http://shopping.originpublishing.com/chart.asp?id=974&category=5