Plaffo.com reports Nokia is sponsoring free Xbox 360 props for Italian users.
The prop is a Nokia Lumia 610, and is available for clicking on an Xbox Dashboard advert featuring the phone.
It is available in white, red, blue and back, and if you do not want to bother starting your 360 or do not even have one, it can also be purchased for free by using these links below.
Gadget Nokia Lumia White
Gadget Nokia Lumia Blue
Gadget Nokia Lumia Black
At present it seems only available to Italians. Read more at Plaffo here.