Apple tends to stay away from half baked ideas. It probably just wasn't ready and the microscopic marketshare of OSX Server would have made a major shift in pri

Apple tends to stay away from half baked ideas. It probably just wasn't ready and the microscopic marketshare of OSX Server would have made a major shift in priorities hard to justify. They never planned to bring ZFS to OSX client in 10.6 so this doesn't really effect many people. I would expect an updated SL compatible ZFS read/write beta on ADC at some point before 10.7