Re:ZFS, supported equally on your OSes (Score 2, Informative)

zfs-fuse does not currently compile for platforms other than Linux, despite FUSE's general compatibility with other systems. The Mac OS X ZFS port worked for me under Leopard, and I think it works under Snow Leopard now, though it is no longer being developed by Apple. Last I checked, the ZFS pool version supported by these two implementations differs, so you'll need to create your pool with the latest commonly supported pool version to ensure compatibility. In short, I do support the use of ZFS, and I personally use zfs-fuse, but it's of far more use when shared over the network due to the problems with ZFS implementations on various platforms.