Hi,
I came across this post this morning I must say it is a very interesting concept. I believe many people misunderstood BillHarrison however (or maybe I am?)
I think that what BillHarrison said is that you could have your (everyday) PC or laptop (the computer you use in real life). You then connect this to your Amiga CPU socket. Have an emulation software running on the PC which emulates the an accelerator card (or even PPC card). When Amiga sends data from the CPU port (as per usual) the emulation software on the PC would receive this, process it (having access to all the memory on the PC should make this a no business) and return the output.
If that is what BillHarrison said then all there is to be developed is the emulation software and a cable to connect the PC to the Amiga CPU port. Considering that there is plenty of hardware material to connect a PC to an Amiga, and that the emulation software already exists then I cannot understand what the problem is.
With a little bit more of effort then the software could emulate something like a the GVP A530 which had not only the processor but also a hard drive inside it and thus all your software could be installed on the same pc hard drive. This would also make it easier to see how different operating system worked on your Amiga Units, etc, etc (I am running outside the main point).
I know it is not the same as having the original Amiga hardware but I believe this is the best next thing.
Regards,
Sim085