Does anyone know if they are able to access and use the native multimedia decoders in Android directly? http://stackoverflow.com/questions/3912563

The Known Issues and Features in the Works page for ZFS on MacOSforge explains the situation pretty well. Integrating ZFS into MacOSX isn't just a matter of creating a device driver. Time Machine, Finder, Spotlight and other core OS products needs to support ZFS features explicitly, since ZFS behaves a lot differently from HFS+.