Developing something like that is beyond my skill range, however I have some questions for you.
1. Why Linux? Why not BSD? Why not DragonflyBSD? Dragonfly exists to introduce some Amiga-like concepts into BSD. Their lead developer is Matt Dillon, a long-time Amiga developer.
2. Do you intend this to just be a Linux distro that looks like Workbench, or an actual Amiga-like OS that is based on a un*x kernel(like OSX)?
3. Will you be using the X Window System to provide the desktop, or do you intend to implement a whole new one? If you are using X, how do you propose to implement Amiga screens? How will you handle Gadtools and MUI programs? Will they need to be reimplemented?
Thanks.
Fsckit.