Would you buy a FPGA Amiga that would fit into a 3.5 inch bay?
I think it would be a nice addition to an A500, A600, or A1200.
The host computer could act as a keyboard or mouse.
I suppose it's kind of been done before.
http://www.amiga-hardware.com/showhardware.cgi?HARDID=39But I've never heard of anyone actually owning one of these.