Interesting...:idea:
I'm looking into making a CD32 Laptop (and even that sounds less ambitious than want you are trying here). The one thing that is putting me off is the slow I/O, so if that could be fixed (I considered a IDE - CF adapter then an Lan or even USB CF card, but not so sure if that would work even with appropriate drivers!)
So the possibilty of a small card which would allow say Clockport expansion would be cool. A1200 CPU slot would also be welcome, but I think PCI might be going a bit OTT. You had just aswell wait for (or should that be pray for) a Shark PPC and a small PCI bus board which would make a fully functional and practacally any shape you like computer.