Wrong title! Should be "ZFS on Linux (or ZoL) 0.7.13 Released". The "real" ZFS is still under Oracle's hand and the spinoff is OpenZFS.
I absolutely loooove ZoL and run it on all cluster nodes. Proxmox works beautifully with it. I really hope ZFS for Linux and the kernel can get along, because ZoL greatly enriches Linux usability in storage needs.