If you have about five minutes:
Joe Sabia: The technology of storytelling (Quick and interesting)
If you have about twenty minutes:
JK Rowling: The fringe benefits of failure (For Harry Potter fans)
Steven Johnson: Where good ideas come from (More innovation-related than story-creating, but still interesting. Maybe we should brainstorm our novels together in a coffee shop?)
If you have over an hour and a box of tissues:
Randy Pausch: Really Achieving Your Childhood Dreams (Wow.)
Are there any inspirational videos you'd like to recommend?