It is already available as an "advanced" one-click install; the "easy" version should be "live" in the next day or so.
Ooops! I spoke too soon. It is already in our update queue, and will be pushed live within the next few days (or sooner). Of course, for advanced one-click installations, you can go ahead and install what is there now, and then just upgrade right from within the WP dashboard at any time - no need to wait for our installer to catch up at all.