The best way to learn about ZFS is to use it. If you have VMware Fusion then download a copy of Solaris 10 (It's free) and run Solaris inside a VM and try out ZFS first hand. Solaris runs well inside Fusion if you have 2GB on a dual core Intel Mac.
What I find is that Sun's interface is not very good and while usable by much of Sun's user base it would be a unworkable on a Mac. This is why Im following ZFS on and mac. I really can't wait to see how Apple handles the user interface issue. Let's hope they think of something new
Actually it's not that bad on solaris....if you really have to there is a web gui to zfs. I cant remember what port it runs on though