Ever find yourself looking for tools to help you prototype apps for the iPhone? After an hour or so wasted looking for Visio iPhone stencils, I came across a PSD-based solution that did the trick for me. It is amazingly ease to use and resulted in some gorgeous high fidelity prototypes that very accurately conveyed the app’s design in a way that made it a breeze to sell my team’s idea. Give it a whirl, you’ll love it. You will need to have Helvetica Neue available. Download it free from the Teehan+Lax blog.