D80 not sure. D70s dun have any built-in effects.
Better not to have anyways. eg. if u shoot in black n white later cannot change back to color also cos the original foto got no color range info. better to shoot in color then convert yourself.
Wrong reason to be getting a dslr if you're looking out for such functions... (but of course, design and marketing dept of major camera brands think otherwise. heh)