I have created the ultimate in useless beasties.
I have removed the CRT from my G3 AIO thanks to much patience from my wife, a spare lcd that I wasn't using, luck and a dremel (black and decker rotary tool, actually) I have replaced it with with an LCD.
The LCD is powered off of the internal rail, and everything works the way it is supposed to.
The box is currently running 10.3.9, 9.22, has 768 megs of ram, a sixty gig harddrive, a 16x dvd, the original processor (233mhz g3), usb2.0 and firewire.
I need a USB 2.0 wifi adapter that will work in OS X, so right now I'm using the onboard 10bt.
I currently can't play DVD movies, but I'm working on a way around that right now. (it reads dvd's fine, but all programs give an error when trying to play movies)
I deliberately made it a little ugly, to help emphasize what it is.
More pictures and a step by step will follow when I'm not so lazy.