I didn't know, until I messed with the phone while I was half sleeping...
To take a screenshot of whatever you're seeing, simply press:
Home + standby key
You will get something like this.
The image will be saved in Camera Roll in which you can do anything to it.
Will start thinking of apps review since I managed to do screenshots.
Hope you enjoyed your iPhone as much as I do!
- Posted using BlogPress from my iPhone