For the more intellectually adventurous, here is a link to a chapter from my book Integrated Intelligence. It's the sixth chapter of the book, "Debates and issues regarding the nature of intelligence". The chapter outlines several theories of intelligence, and analyzes them to see if they contain any reference to the idea of integrated intelligence, or INI (INI is a kind of spiritual intelligence -for those unfamiliar , with this concept, click here for a brief summary). I also make some general conclusions about mainstream intelligence theory in general. It's a good overview of intelligence theory for those interested in knowing more.
Here's the chapter, on scribd.com.