If you are using Firmware Version 2.0 in your iPhone or iPod Touch then you can make screenshot of anything seeing on the iphone or ipod touch screen with this little shortcut.

How to make Screenshots
1. Get to the location in your iphone or ipod where you want to make the screen shot.
2. (See the above pic) Hold down your ‘Home’ button and then press power button on top.
3. You’ll notice a screen flash and your screenshot will be saved in Photos > Saved Photos (see below image)

Many people were posting their screenshots and i though they were using some sort of app to do that but after a little googling i came to know this new feature in this new firmware there are many other new features and this screenshot feature is really handy when you want to share what exactly was on your screen.