From what I can tell, those of you with super elites can swap them for the new model at Game.
They're currently advertising the new model is available half-price when you trade in your super elite. The current trade in value of such is £100 (http://www.game.co.uk/lowdown.aspx?lid=13465&cm_sp=xbox360-_-topnav-_-tradein), whilst the new price on the latest model is £199. Technically they will owe you 50p!
(nb - yes I *know* they probably mean that you give them your super elite and they charge you £99. But the official in-store advertising clearly states purchase it for half price when.....)