ummmm backup does NOT back up your media. so dont bother with the person who linked that post. he/she doesnt know what they're talking about.
I do know what I'm talking about. The backup does include pictures from your camera roll. It does not however include pictures synced from iPhoto. The OP didn't specify, so my suggestion is valid. amy-is-bad
Actually I extracted all the camera roll's photo from my itunes backup using the method dZp provided. So, thanks dZp again.