when will btrfs-progs (stable??) arrive in ubuntu repositories?

view full story

http://askubuntu.com – just realized that arch linux exchanged btrfs-progs-unstable (from 2010) with btrfs-progs (from 2012, presumably stable, at least not unstable). I am aware that arch is normally very quick at upgrading. When is this (or kind of) package expected to arrive in official ubuntu repos? Thanks... (HowTos)