I'm sorry, but didn't Hyperion release an Amiga OS with a Linux-like structure to it called "AmigaOS 4.1?" It doesn't have open source drivers, but has memory protection, runs legacy Amiga software, is still under development by programmers, and supports old and new hardware, albeit PPC based (helps with Endian coding and similar microcode). It doesn't run on as much hardware as Linux, but does it really need to? MorphOS runs on a smaller PPC base and is much less well documented. How many "Amiga-like" OS's are required? With WinUAE (and the others) you can boot into an Amiga OS from dead cold and never know you weren't running on "native" hardware -- as if there was such a thing anymore.