To all the people doubting the use of such a device, many OSs don't currently work "out of the box" with unetbootn and other such tools. I've personally had problems with RHEL and Windows XP, and I can guarantee there are others. With RHEL, you had to copy the rpm repo on the CD to another storage medium and manually set up the repo. This is because the default repo is set up to detect an optical drive, mount it, and…
It seems like you would still need to copy the rpm repo to another medium? Apt changed my life...<3 debian.
"If you boot the iso from a harddrive (or the equivalent, a 'normal' usb stick) the installer fails because it explicitly looks for a CD/optical medium containing the repository"
With the gadget in this article that wouldn't be an issue anymore: The thumbdrive _is_ an optical drive for all the OS knows.