This is intentionally left broad. If you wanted to show users what iPhone/mobile applications could to for them. The more interactive the better, but it must be quick to build as you can't code up every idea. Let us assume real-time games are out of scope. Throw out ideas or state which approach would be best.

Here are some of my ideas, what are yours?

• Hack a app that loads mostly web or image content, but has hyperlinks to get around in. This would mean static data.
• Build screens which look great but can only be navigated in a story board type fashion.
• Load the web version or equivalent on the iPhone and say: now image the buttons and navigation is better.
• A paper based prototype.
• Flash or video walk through running on the phone.
• String existing iPhone apps and web pages together with minimal glue just to convey the idea.

Can anyone share prototyping methods for other mobile devices? Ex: The palm prototype was just a block of wood and note pad that was carried around.