Interesting indeed. As a collector of speaker drivers, I've come to the conclusion that natural fiber cones sound best in drivers 3"-4" and above. JVC claims to soak the cone in sake (rice wine) to prevent it from splitting. I spoke to another driver maker and he said that he's done the same but that after a period of time the cone eventually splits.
The JVC wood drivers are relatively new (have been out in Japan for at least a year) so the jury is still out regarding its longevity.
Keep in mind that it is a small cone so there will be no bass. Still, extrapolating on my experience and based on woods natural/favorable resonance, I would think that it should sound pretty good.
Keep us posted if you decide to buy a pair.