Yet another reason to get an iPad. Check the "Rewind" gesture at 1:35.

"Created by User Experience professionals and built upon the principles of
Design Studio Method and Adaptive Path's Good Design Faster, UI Sketcher enables you to rapidly sketch, refine and share user interface ideas."

Read more on uisketcher.com.

Really interesting to see the evolution of the design.

An interesting approach, taking a photo of your sketch and using it in your wireframing/prototyping tool. I wonder what happens if you need a full-blown spec. I'm afraid it's not really scalable.

Sketching is a critical part of the User Experience Design process.  Sketching allows us to explore ideas and iterate on concepts quickly and easily before creating detailed mockups.  Below is a roundup of many different sketching articles, tools, templates, presentations, videos, books, and examples to help User Experience Designers learn more about sketching and how it benefits UX design.

http://www.inspireux.com/2010/06/28/50-sketching-resources-for-user-experienc...