You mean act? The game will have three acts and then and epilogue so if you're waiting for the act to be finished then you're basically waiting for the game to be finished :)
As for progress, it's impossible to say. The end is approaching, but I can't give any kind of timetable for it as even though I have all the major plot points written out, the actual content leading up to each of those plot points I prefer to write more organically.
Plus, people keep asking for stuff ;P