It's out, as promised. (The timetable, I mean.)
Barring unforeseen bugs, in July some sims on the main grid will have mesh enabled, and by the end of August, it will be enabled everywhere.
Yay, finally! (Or as they say in Esperanto, finfine! That's an example of emphasis via repetition; it might be translated as "at long last!" or "geez, fi-nally!")