Ah....what I thought you wanted was a single earth with one hemisphere covered in shadow. You want two worlds mirroring each other correct?
Two people have already provided art and both are better than what I had in mind but I might go for it anyways
dd, what he's got up there's great (and what I intended). Sorry if I confused, but if you still want to go ahead and give it a shot, that would be great to be able to compare. But I only see his, who's the second artist?
(besides my crappy art xP)