@amigadave
That's a very nice little fantasy... But it's not realistic, if the idea of an Amiga is to be real, we need to decide exactly what we want to acheive and why.
I've been here before 5 years ago, so I have no desire to rehash my old OpenAMiGA spec...
But think about it... A reasonable goal would be to create an opensource platform totally compatible with the Amiga500 with the intention of perhaps building an all in one games console... For example.
This is both achieveable and realistic, the minimig needs bug fixes and cost reduction, Aros needs the 68k port to be brought back uptodate (but we would only need 1.3 compatibility)... So there is a lot of work to do, but everything needed is already there. If this can be done then more advanced plans can be made.