I have been working on some iPhone application designs lately and stumbled across how to take a screenshot of your iPhone screen. This is really helpful for comping the home screen or capturing application prototype layouts that were produced in the application development software.
1 – Navigate to the content you want to capture
2 – Press the round power button (front) and thin power button (top) together for 1 second
3 – Release them and your screen will flash white with a camera sound
4 – The image will be available in your photos application and can be imported through iPhoto though the thumbnail may not always appear in the preview window.