Well, i didnt read all the thread yet, but i saw some talks about what hardware to support...imo, no bounty related, to port the aros rom for uae can also be done changing the uae code...so the hardware to be supported will be UAE (and you can change the UAE code)...ok, it will not work on actual UAE, but im sure the UAE team will accept the changes backingporting.
port for uae is not port for all 68k family...but its a start!
regards