Errrr.. where does it say that absolutely everyone doing beta testing for OS4 is on 68k?
It doesn't say that anywhere, because that would be incorrect. And luckily for portable code it's not per se necessary to do all testing in a PPC native environment. Actually that's one of the most important advantages of using higher-level programming languages.
So if you have a proper background experience but solely have a powerful 68k solution available to you, you may still be helpful to the AmigaOS4 team.
