this year i downloaded Deskscapes from stardock and used the winter snow by neil banfield wallpaper dreamscape, it can be configured to add your own wallpaper to it,
here is a terrible quality screen capture using camtasia.
anyone who knows how to make a better job of it please share your ideas.
anyhow the actual deskscape looks amazing and the snow flow looks very realistic
again sorry for the crap quality of the vid
edit, i used the laptop which has a smaller screen and the upload was better.
though still not great