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ZFS for OS X is now available. Doesn't boot yet but everything else is a go. Wow. If this actually works as it's described it is so amazingly cool I can't believe it.
I'm really curious how this will turn out. Usually when someone says "I'm going to to really rethink this problem and just start from scratch" it is not a good idea. Especially if the complexity of the project is high. And building a filesystem is just stupendously complex. So you'd think these guys would have a very high chance at failing. And yet maybe they did it?
Inside Baseball Apple bit: I wonder if there is an internal tension between the ZFS people and the Time Machine team. I'm sure Time Machine is some impressive work (seeing as it works on HFS,) but you pretty much get it all for free with ZFS!
Still, it's a lot of risk to move to a new filesystem. Even if everything goes perfect I'd be surprised if Apple moved to it before 2009. And maybe it won't ever make it (or maybe only on OS X Server.) You really have to test and be 200% sure.