I've got the digidesign 12port nubus-nubus expander. The expansion slots' standard slot space shows up in the expander card's superslot space. 24 bit mode obviously isn't supported because of this. Basically none of the cards in the expansion chassis work without special software that knows where to look, like the digidesign software knows to look for digidesign cards there.

I still have dreams of modifying slot manager to handle this config.

Come to think of it, what other cards use superslot space?