If another person tells me that the UCI has just relented and allowed disc brakes in Cyclocross I may spontaneously combust.
Next season we'll let you run your discs, ok? This season you're stuck with cantis / calipers / v-brakes. Now shut up. Please. My family needs me.
***EDIT*** The above statement ONLY applies to the CX category. You can run your discs, risers and whatever suspension/adjustable items in the 'Other/MTB' category with no concerns! Apologies for the confusion.