This is #4 of 7; I haven't seen #5 yet on youtube. If you skip in about 7 minutes, Mr. Wagoner talks about the Volt that he "Doesn't rule out sharing Volt technology" in the future, and about just how much is riding on the volt's success.
http://www.youtube.com/watch?v=pDC69EKIjHo
http://www.youtube.com/watch?v=pDC69EKIjHo