Having a bootable USB disk drive comes in handy, and what else can be better then to have your bootable computer rescue kit or favorite linux distro right with you on your iPhone, as my previous post shared how you can make your iPhone work as a mass storage device somebody used USB Drive creatively making it work as a bootable disk drive which lets you use iPhone as a bootable computer rescue kit, launch Windows setup, and use other bootable USB distros/live cd's.