A much more realistic scenario would be Apple coming out with some device, under a new line, that will use Intel's Atom with Nvidia's ION platform.
The intel atom processor is never going to be used in an apple product, apple always has to be ahead of the curve. If apple does decide to implement the atom into a device, they will have a version modified by either themselves or intel to push them away from the competition. By this point, I don't think it is fair to say that this processor is still the atom.
One and a half years ago, Imacs began shipping with core 2 duo processors designed and built by Intel, we are just now beginning to see these processors showing up in Dell computers now as they make the move from pentium dual cores.