Theres a video on the JP site about the penguin people. I think they're called Morenis or something.
I've been looking, cannot find it. Also, if anyone speaks or can read Japanese text, could you do us all a favour and scan the Japanese site for any interesting confirmable tidbits, like names, locations, etc.
I don't know if it's been said on here yet, but I read that the goddess's name is Hylia, which actually makes a lot of sense.