The paper prototype is generally used as a design tool and even usability testing tool, but the folks at IG Index have figured out a creative way to use sketches and paper prototypes as a communication tool in place of wireframes for demonstrating interaction to development teams. Martin Belam posted video from UX London 09 of Jane Austin, Chris Neale and Frances Eida discussing this simple method of taking wireframe/storyboard sketches or paper prototypes, and creating stop-motion animation to demonstrate interface. Wonderful stuff. More at Currybet.
http://www.currybet.net/cbet_blog/2009/09/uxlondon_redux_jane_austin_chris_neale.php