So footage of the tutorial has hit Youtube and has been up for four hours as of this writing. That seems unusually long for NDA-breaking video, but whatever. It's about eleven minutes of SimCity goodness for you to take in. There are brief looks at different systems within the game as well as more of the art and graphic style (which I love). Enjoy this footage while it lasts!
Edit: Found a mirror! See it now if you haven't!