As a PS3 owner, I find this all very interesting. Not sure if everyone knows this or not, but the PS3 does allow for an "Other OS" and people have been installing linux on it for some time. Don't see why that "Other OS" can't be Amiga OS 4.1. However, the PS3 hypervisor is still running and I'm not sure that full access to the GPU is allowed (Sony probably doesn't want someone coming out with free Linux games to rival costly PS3 games).
At any rate, even with the hypervisor and crippled access to the GPU, I'd be interested in a PS3 port.