I used it a lot.
It will be updated soon...
Looks like it is abandoned...
Wrong place to look for release dates.
https://wiki.mozilla.org/RapidRelease/Calendar and for even more up to date see Release Management Calendar
I am not looking for release dates, as the wiki link says for itself it is "Features/Release_Tracking" so it is all about tracking the implementation of different features.
I guess that had to do with the bugzilla update to version 4.2 back in January. So, what does "soon" mean now?