I've been busily prepping for several full days of classes this week so I have no new art projects to share, but thought I'd let you know about several ongoing "countdown" offerings I've found.
Lisa Vollrath is offering her 25-day countdown to Christmas at http://countdown.tentwostudios.com/
Tim Holtz is doing another "12 Tags of Christmas" on his blog: http://timholtz.typepad.com/
Roni at http://inkstainswithroni.blogspot.com/ has 25 days of Christmas ornaments.
And you can find 12 days of Fast Holiday Ideas at http://colormedaisy.com/messageboard (Scroll down to find the thread with the holiday ideas.)
I think these sites may keep you busy for awhile and give you some great ideas for holiday projects!