Fez is done, apparently. This Polytron tweet confirms the 2D/3D indie platformer has been submitted for certification.
The anticipated indie game was supposed to release in early 2010.
Fez features 2D/3D shifts similar to those seen in Super Paper Mario and Crush. According to Wikipedia, "The use of Escher-like optical illusions also predominates gameplay in a manner similar to Echochrome. Gameplay is similar to that of Armor Games' Sky Island."
Fez is one of the games featured in Indie Game: The Movie.
Watch an "extended screenshot video" of it here.