I'll just note that it is the implementation of ZFS that is pre-1.0, not the filesystem itself. The ZFS filesystem itself has been production-ready for several

I'll just note that it is the implementation of ZFS that is pre-1.0, not the filesystem itself. The ZFS filesystem itself has been production-ready for several years now. That said, I might use the current Linux implementation for my non-critical data, but for anything important I'd stick to Solaris/OpenIndiana. There's also a decent implementation on FreeBSD, but I'm not a fan of that OS.