IIRC, Kodak did put their 400CN films in APS cartridges for a while, so you could get b/w images from an APS camera. The problem with the format was, as previously mentioned, it was so late to market that it was essentially stillborn. If they had gotten it out the door four or five years earlier, it could have had a viable life, but by the time it came along, digital was reaching the consumer/prosumer market.
As to APS SLRs, Nikon and Minolta both marketed interchangeable lens SLRs for APS - the Nikon Pronea and the Minolta Vectis. Pricetags and funky names combined with limited utility and strange ergonomics/cosmetics did them in. The Minolta looked kinda like a rangefinder but without any rangefinder windows on the front, and the Nikon, well, just the name sounded like an eye disease. Plus the fact that they never came out with a model (much rumored) that would take Nikon F-mount lenses. The fact that whichever system you went with required their own unique lens mounts with a new, specialized set of lenses doomed the APS SLRs.