I haven't really been following along, I confess, but I tried to find information to answer Gith.
I see nothing new. The FAQ mentions alpha and beta "are planned for 2017", future tense. The usual "no promises: disclaimer too so it's unclear whether they actually ARE in alpha, let alone beta.
Though backers would presumably have a notice since some levels include access to earlier development.
After Landmark, I am dubious about backing something in any anticipatory fashion.
Needless to say, with outdated info on the alpha/beta, I didn't see anything about an actual release date.