Gamesblog has posted up a longish Q&A with Project Zero creator Makoto Shibata. Shibata talks about the game's Japanese influences, his own dealings with real-world ghosts and some of the play mechanics of the game.

A sample after the jump:

How does the introduction of these multiple playable characters and their unique abilities affect gameplay?

Rei is the heroine and has both speed and power, making her a well-balanced playable character. She can use 'photoflash', which makes ghosts hesitate in their attacks, thus giving you an advantage in battle. Players get to play as Miku and Kei in Rei's dream. Rei takes on the role of a priestess who feels the suffering of others. In the end though, she will face up to her own suffering.

Miku has strong spiritual power. She can use the camera well, and is able to charge it with the highest spirit power of all the characters. Thus, she can deal out the biggest damage. She also has an item which is able to slow time. On the other hand, her physical power is weak, and the capture circle of her camera is small. She is the character who is the most difficult to master for the player.
Kei has little spiritual power and he can charge the camera only once. However, his camera has a rapid-fire function. Also, he has ability to hide from ghosts. He is the type of character who does not fight a lot, but prefers a stealthy approach.

Each of the three characters has different features - not just in battle, but also in the way they explore. Miku is small and can crawl into tight spaces - even under the floor. Also, some particular spirits will cooperate with her. Kei, in contrast, is physically powerful and can move heavy stuff. He has a lot of knowledge and can read ancient documents. So you see, they each have different roles although they explore the same environments on the map.

I Call it Subtracting Horror [Gamesblog]