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... i couldn't see anything that you would class as a secret.

The secret about OSX 10.5 is

IT ISN'T WINDOWS VISTA.

Crafty, huh? That Steve and his Jobs; what a great dude.
He should release this on halloween and give away candy to the kids in costumes.
Call it OSX Jackolantern.
Have naked women dancing in the store windows with iPhones in hand.
Maybe give away $100 bills.
All this is good marketing, but possibly bad business.
 
It is worth noting that not even Sun fully has ZFS working.
It is one of those things that it can be used for storage, however not booting.

Sure this is mostly because their kernel and boot loader haven't been fully rewritten to allow for it, much like most other "bleeding-edge" filesystems.

While Apple does have their very own BIOS replacement which allows them to do quite a bit more than Sun would be capable of, however they are still limited by the specifications that Sun has published.

I personally have been holding out a lot of hopes for this, that Apple would get ZFS to work directly through modifying their EFI and OpenFirmware implementation, in turn bypassing all the craziness that Sun is needing to jump through. It seems that this is simply not going to happen for Leopard though.

It doesn't mean that they couldn't allow for read/write volumes in a Leopard update, however this is one of those things that screams "MAJOR NEW FEATURE", so would wait for 10.6.
 
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