When taken photo on the iPad 2 it can make a loud shutter sound. If you like the sound you could switch it off. Here's how:
1. On the side of the iPad there is a volumn button, use the volumn button to lower the sound or even switch it all the way to silent so you won't hear anything at all.
I think at the moment you cannot change the shutter sound, so unfortunately you have to accept the default or turn it to silent.
It doesn't matter if you use the front or the back camera, you will hear a shutter sound when taken a photo.
While taken the photo you could switch between the front and the back camera by tapping on theĀ icon.