i think it would be a waste of r&d dollars for a small company like bike friday. as cool-looking (IMO) as they are, airnimals aren't exactly selling off the shelves, from what i've seen. pricewise, most people still think $1000 is an absurd amount to spend on a bicycle of any sort, and i don't think a BF model with 24" wheels is going to be the decision-maker. a lot of people just aren't going to go for a small wheeled bike, whether it's 20" or 24", until they've become a mainstream thing.
i think a bigger company like dahon would be in a better position to try to tackle that problem, but i still have doubts as to whether it would ever be profitable for them. and i bet people on this very forum would decry whatever company tried it for selling out to the masses.