I waited through all three days of E3, and Natsume failed to deliver that all-important release date that'll get pushed back three or four times. I really want to get my preorder in, simply because I'm afraid I'll forget to pick this up when it does eventually come out.
I poked around. Game Informer's preview indicates that Natsume is aiming for September. Natsume, however, has a habit of having a very... loose... release date for their games, so who knows what'll happen.