Though I don't have a need for one, a //e PS/2 keyboard adapter, along with the new Apple //e VGA adapter, would allow for a //e to be easily integrated into a desk full of PCs using a KVM switch.
I don't have any expectations that something like this will ever see the light of day, but I'd love to see a "KVM Adapter" for a IIgs. Mine would get more use if I could run it through my KVM.