iPhone SDK Sound Grenade Tutorial

A few weeks ago I made the app Sound Grenade, and now I would like to share the thought process that goes on when I'm creating an app like this.

This tutorial is not meant to be the be all and end all of how to develop iPhone Apps. But if you are new to the process, or have started a couple of apps, then this could be a good tutorial for you.

Please let me know if there are any topics that you would like to make a tutorial on.