The trend toward modeling software is helping to fix the requirements mess.
If you're interested in learning how to use models and prototypes and demos to jump start innovation, you may want to attend iRise's webcast on December 8 -- Innovation: The Next Great Frontier. There's an added bonus. If you watch the entire webcast you'll get a free copy of Michael Schrage's Serious Play.
And if you want to get scary serious, use a storyboard to model your demo.