We just had the Domino's Oreo Dessert Pizza delivered here at the office. It's about as good as you think it would be. (How's that for damning something with faint praise?)
The base layer is a thin crust that would be reminiscent of graham cracker if it weren't so bland, topped by a vanilla icing, with some Oreo crumbles applied atop in a swirled pattern.
This 10-inch dessert pizza is $3.99 with any purchase, but it would be an unthinkable order addition even at $0.00.