I'm sure there are a few charcoal motleys around, and there are PLENTY of ghost motleys, although many are probably described as pastel motleys. I've added a pic of my ghost motley male. Charcoal stripes are possibly not as common yet, but I'm sure you'll be seeing many more of these, as well as ghost stripes, in the future. I have 2.4 aneryth motley stripe het ghost that I kept from this years hatchlings, so watch the photo gallery around 2005.
If I understand the genetics behind aneryth A and aneryth B, and have read the Corn Snake Manual correctly, the resulting offspring of this combination, assuming neither is het for anything else, would be normal.
To elaborate...in their homozygous recessive condition, aneryth A and aneryth B remove the red color, even in the presence of the "opposite" homozygous (or heterozygous) dominant genes (recessive A over-rides dominant B, and vice versa). Breeding them together produces a heterozygous state in both pairs of genes, resulting in red color being produced...a normal.
Now the real question here is, if a snake is both homozygous recessive for BOTH aneryth A and aneryth B, what would the snake look like...A or B or a combo of both?