Vorgestern hat sECuRE die zweite Version von i3 veröffentlicht, ich zitiere an dieser Stelle einfach mal die Zusammenfassung der Neuerungen aus den Release Notes:

The most important change probably is the implementation of floating clients,
primarily useful for dialog/toolbar/popup/splash windows. When using i3 for
managing floating windows other than the ones mentioned beforehand, please
keep in mind that i3 is a tiling window manager in the first place and thus
you might better use a "traditional" window manager when having to deal a
lot with floating windows.

Now that you’re warned, let’s have a quick glance at the other new features:
  * jumping to other windows by specifying their position or window class/title
  * assigning clients to specific workspaces by window class/title
  * automatically starting programs (such as i3status + dzen2)
  * configurable colors
  * variables in configfile
 

Ferner sind inzwischen auch i3lock in Version 1.0 und i3status in Version 1.2 erschienen.

Links:
Projektseite
git Repository
i3 im AUR
i3-git im AUR
i3lock im AUR
i3status im AUR