Talking Kaiju

I wanted to start this thread off with a question and a simple request. First the request, I Absolutely cannot WAIT for Pacific rim and I also cannot wait to read the Graphic novel, but I have not gotten to read it yet so can we keep this spoiler free from the Novel please? That would be awesome. So, I am coming into this movie a Kaiju/monster movie fan and REALLY like the design and idea of the Kaiju in this movie so like everyone I have a question or two. First off, does anyone know if the Kaiju are all stand alone organisms, unique in and of themselves? Or is Otachi and LeatherBack a species rather than a single Kaiju? Second, do we know if they are sentient yet?