@Rogue
Don't worry, you don't.
I'm sure some my programs work under AmigaOS4, too. I can't test though.
@Everyone
The rules of the contest limit the target system to AmigaOS4 only, using many AmigaOS4 only components. With requirement of Reaction and other OS4 components, it's close to impossible to develop the program on anything else but OS4. Since OS4 is only available for AmigaONE, the contest is pretty much limited to existing AmigaONE users.
Wouldn't it make much more sense to give more flexibility, and thus make it possible to develop the program on AmigaOS 3.x, AROS, MorphOS, WinUAE, Amithlon etc? Obviously the final competing entry would still need to be OS4 native binary, but with portable code that wouldn't be too hard.
I am sure the contest would be much more of a success with wider audience. Limiting to Amiga coders with AmigaONE just limits too much, IMO.
Finally, I believe giving the AmigaONE system to someone who doesn't already own one would be much more sensible in promoting the AmigaONE platform.
Just my .02 euros.