No casts information yet but the staffs for the first episode is already out. I couldn't get any confirmation though. The source seems to be latest issue of NewType Magazine.
Episode 1 - Failing Mark / Welcome to Hidamari Apartment
Storyboard: Shindou Satoko
Episode Director: Miyamoto Yukihiro
Animation Director: Itou Yoshiaki
Storyboard is TBD can be either SHAFT screwed up again or there will be a surprise, like Shinbo Akiyuki doing storyboard by himself the first time in a while. I hope for the latter.
Edit: According to
Sendenman blog, the storyboard was done by Shaft's new staff Shindou Satoko.