Forbes has a nice interview with Tina Seelig, author of the new book inGenius: A Crash Course on Creativity. I haven't read the book (though it's on my list), but the interview is worth a read.
Particularly intriguing is the fact that Seelig is a neuroscientist, so she approaches creativity from a very different perspective than most writers and thinkers. In the interview, Seelig states that creativity is both a natural characteristic and a learned skill, rather like musical or athletic abilities. I look forward to reading the book and learning what neuroscience has to say about innovation.