I'll wait for kfs. </joke>
Phoronix: Debian's GNU/kFreeBSD Installer Will Support ZFS
While Debian GNU/kFreeBSD has supported the ZFS file-system with its FreeBSD-8 kernel, support for installing the Debian GNU/kFreeBSD distribution to a root ZFS file-system will now be possible with the Debian 6.0 "Squeeze" release...
http://www.phoronix.com/vr.php?view=ODg0Ng
I'll wait for kfs. </joke>
If they succeeed and it becomes a good product, I wonder what they will decide to do with Debian Linux and what will happen to all de derivates of Debian (e.g. Ubuntu). Will they also start using BSD...