Oracle dumped OpenSolaris in Fall 2010, and it is unclear if Oracle will continue to publicly release updates to ZFS, except maybe after they release their next major version of Solaris.
FreeBSD now has ZFS v28 available for testing.
But where did v28 come from? I notice that the main ZFS website does not show version 28 available. Has this website been abandoned? If so, where is the central website for the ZFS project, so that I can browse the repo, read the mailing lists, read the release notes, etc.
(I realize that OpenSolaris has been dumped by Oracle, and that they are limiting their ZFS releases to the community).