@iggy
This is surely way over head for pure hobbist and as soon as you make any kind of buisness out of it your bound bind the law (and yes thats a goog thing).
Neither Applied Micro nor Freescale over 100% pincompatible and RoHS friendly 603/604s and a redisign would blow costs out of water (mind you "we" will probraly also fail at getting the pcb-layout from Phase5/DCE anyways).
If you think that is simple, just look back at all the effort Jens had to put into his rather simple 030 bases ACA-cards.
Yes, I'd absolutely agree with you that where this whole proposal collapses is in obtaining Phase5's schematics or PCB layouts.
As far as redesign goes, I'm not your typical hobbyist in that I have some rather expensive design and layout software and I used to work for a company that built its own 68K based systems.
And yes, I was actually proposing a redesign to use compatible (but not pin compatible) PPCs.
Sounds horribly complicated, but with the right software its actually just tedious and time consuming.
At one point, before the MorphOS team adopted G4 Mac support, I'd completed about 50% of the work to convert a Freescale MPC8640 design to use an ATI SB600 (instead of a Uli Southbridge). Now THAT was difficult.
I don't think this would be as hard, except for one qualifier (two actually). The design would have to remain completely Phase5 software compatible. And, if I'm not mistaken, it violates the MorphOS development teams terms of agreement to use their software on boards built by other companies.
So, I'll place this one on the back burner, and accumulate data and suppliers list for it.