I've seen a few computer case mods in my time, but none like the Piano PC Case. David Scothern actually built a PC into an old piano that he bought on eBay.
Scothern originally intended to give the piano to his wife as a gift, but soon found it infested with woodworms and in need of major repairs. Instead of tossing it, he did what any geeky DIYer would do and created the Piano PC Case. The case houses three monitors and can fold down to hide the PC and peripherals from plain sight.
Check out the Piano PC Case above and read below to learn more about this classical case.