A few weeks ago, Paul Graham wrote a great essay about doing things that don't scale. As usual, it's clearly argued, well written, and full of solid advice. If your first instinct as a product developer or entrepreneur is to automate everything you can, I recommend reading Paul's piece.
Your iPhone, iPad and other device screenshots automatically processed on the fly to be placed within a realistic environment of your choosing.
Uses creative commons license. Meaning can be used in a commercial setting