As announced before, ZFS v15 was successfuly imported into FreeBSD! For a time there was an option of importing just v15 or proceeding directly to v16 but the community has decided to first import the older version for reasons of stability and compatibility with Solaris 10 Update 8.
Some of the new features are:
1. Stability - more mature ZFS code, comparable to Solaris 10 update 8 with latest bugfixes
2. Compatibility - Solaris 10 update 8 default ZFS pools can now be imported into FreeBSD
3. Features - user and group quotas (ZFS-internal) are very useful for intranet fileservers that want to use ZFS
4. Speed - a 15-20% RPS yield in PHP webserver workloads with codebase on ZFS
The full commit log contains a list of Solaris updates applied to the code.
Though the current ZFS version is somewhere in mid 20-ies, I'm completely siding with the crowd which would rather have a stable ZFS than a more flashy ZFS.
The new code (ZFS v15) will first appear in FreeBSD 8.2 and/or 9.0 releases.