I almost cannot wait for this. Native file system encryption will be so good, because it removes the ugly/inelegant layer of indirection with Geli or LUKS, and it allows stuff like encrypted ZFS send and receive. It allows you to switch on and off encryption dynamically. That will allow you to use services like rsync.net without having to place as much trust their internal security practices.

It's great they're taking their time, but I've been looking forward to a stable release since its announcement almost a year ago :)