a blueprint? no. i do have some photos, tho -


you can see most of the process there. you'll need:

a G4 cube (or at least the innards)

a plus/classic/se/... chassis

8 or 9'' LCD screen with VGA input - i used one of these:

http://dynamixcomputers.com/lilliput_841.html

USB hub (the cube only has two usb ports, and one will be used up for audio)

USB audio converter - something like this:

http://www.usbgear.com/computer_cable_details.cfm?sku=165143&cats=136&catid=121%2C637%2C136

moderate soldering skills, dremel or similar rotary tool

several weekends

an understanding spouse/significant other (optional)