Personally I think there wil be market outside of the AMIGA community for a PPC mainboard as long as OS4 is not the only OS designed for it to run. If Linux will run and lets face it, people hack linux to run on most things including PS2, then I think Trokia will be able to continue to sell mainboards.
The mainboard could also answer Morph OS users too. I don't believe there are license issues around other OS's, just AMIGA OS. So once they have an AMIGA license, they can run whatever they like including AMIGA OS.
The only thing about the post I found dissapointing is no time frames and that it seems to still be in negotiation status. The negociation can't be avoided and is promising but not solid.