So I am going to start with playing a Druid for the playtest, and when I was reading through the class feats, I noticed that Thousand Faces let's you cast a spell I can't find in the list of spells and powers, namely Humanoid Transformation.
I am assuming that this is supposed to allow you to cast Humanoid Form, but I thought it might be worth asking in case I missed it somewhere.
You missed nothing. There's no such thing as Humaoind Transformation in the book. It's most likely meant to be Humanoid Form.
I know of at least two more instances of spells being called by the wrong name in a class description:
Irresistable Dance should be Uncontrollable Dance (Fey bloodline)
Arcane Eye should be Prying Eye (Imperial Bloodline)