Buy the The iPhone Rangefinder at the Photojojo Store!
I am not sure how practicle it would be to carry this around on your iPhone all this time but I have to say I am very tempted by the Rangefinder case.
It include the ability to use your iPhone screen as the viewfinder as in a normal digital camera, the shutter button activates the (+) button and it comes with stick on lenses.
This just proves how good the iPhone 4S is as a serious camera and although mainly a bit of funk think it highlights its abilities wonderfully.

