[mitchty]

zfs actually was on a few leopard betas.

Not that it worked well mind you, it made Finder even more useless than before. But it did "work" for varying definitions of the word.

[protomyth]

Yeah, I was more thinking production ready default and integrated into the shipped programs (e.g. Disk Utility).

[mitchty]

Oh I agree, what was there was nice too by the way. Shame it never made it though.

At least we have dtrace!