this is my absolute favorite on line advent callender,
Last years was fantastic, as it contains both secular, and non secular messages.
even before it goes on line on the 30th of november, it looks great..
very pythonesque. I love the old bag playing the organ.
enjoy.

http://www.paperlesschristmas.org/
just open it up, and let your mouse do the walking. clicking on the hotspot link, will explain a bit more....