Maybe,
But - I bet that the onboard sound on the AmigaOne board from Eyetech is supported under Linux using open source driver, so it's a matter of short time until either hyperion or someone else will port the driver from Linux to OS-4 once it's out.
I belive it was done the same using the Sound Blaster live driver (emu10k1) from Linux to AHI. By the way - the CVS version of emu10k1 in Linux already supports quite well the Audigy card.
Hetz (HeUnique)