I just happened onto one of the best interviews on creativity I've ever heard. Cartoonist Lynda Barry's shares her view on play, memories, being creative and how the brain works. She made we want to sign up for one of her workshops! It sounds like it would be so much fun.
Check it out the audio interview #1 at The Progressive: http://progressive.org/lynda_barry_interview_audio.html
You can also download the podcast on itunes.