The only impressive thing about it, is the PPC part? Because hi-tech mobos (new PCI standard, hi specs BUS/Memory/ports etc.) are all over the net.
But if it's amiga related it has to do with OS4.x? So someone has to pay the copyrights, and I don't think some "Non-Apple company", is willing to pay $$$ for running an OS that probably has never heard of.
Linux, AROS etc, maybe the only link of any interest... (admitting that YOU are the one willing to pay some money to buy the hw, and run some AOS flavour).
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PLYMOUTH PRONTO SPYDER