DLC includes a candy cane blade, a snow globe silhouette, and a Santa's Workshop background.
Once downloaded they can be found in the Sensei Swag menu under "Christmas Present."
Not sure how long it is available for…
More info:
http://www.joystiq.com/2011/12/14/fruit-ninja-kinect-spreads…
On a side note, a huge thanks and Merry Xmas and happy New Years to all the OzB crew…I am off to the US of A for a month of R & R, and have promised the missus no OzB for the entire trip!
:D
Pssst, www.slickdeals.net should see you through.