I just came across this thread. I'm sorry I never got back to you folks
I do have the occasion to make a few test images which can be used with UAE (with whatever it takes to make MMU support work) or can be written to disk, CF card, microSD, whatever and used with a real Amiga.
Since NetBSD 8 is coming any day now, I'll make an image with NetBSD 8 which boots, runs dhcpcd to get an IP, starts sshd and allows access to a generic user account which can su over ssh. Two gigabytes should be a good minimum.
Thoughts? Suggestions? Requests?