How big a CF card could (theoretically) be put into a Rio Carbon - or rather - how much memory could the firmware in a Carbon address, were <insert absurdly large number here> available?

I figure that 1)memory card prices fall continually 2)memory card capacities increase continually and 3)CF seems to be staying around as a standard - primarily due to its use in professional photography. It seems reasonable to assume that at some point, I'll be able to (cheaply) install some CF card with a good deal more storage capacity into my Carbon (especially now that it sports the 'developer's cut' - thanks guys!).

If so, what's the maximum it'd take?

-Zeke