My colleague Randall Sadler has already done a lot of work on our EUROCALL/CALICO Christmas Holodeck. It's taking shape at the EUROCALL/CALICO HQ and will be accessible via the Horizons rezzer at ground level. It will include a skating rink:
I am putting together a box of Christmas goodies: decorations, trees covered in snow, and landmarks for Christmas fairs and ski resorts in SL. This will shortly be available in the EUROCALL HQ lounge and also in the Christmas Holodeck.
My Winter Cabin is available via the Horizons rezzer on the roof of the EUROCALL building.