I translated the whole thing into english since this got so many hits.
The HTPC was built using a chassis from a broken Nintendo 8bit system. I decided to paint it white to fit it's intended surroundings in my home. Also the retro look of Nintendo was way cooler 20 years ago. I liked the basic build and wanted to give it just a slight tune up.
The paint job is done with white spray paint, sanded down to remove the orange peel effect and then finished with rubbing compound and automotive wax. The system runs on an Asus AT3IONT-I Deluxe motherboard with an Intel Atom 330 Dual core processor, has a 120gb hard drive for Windows XP and sports two working NES controller ports on the front bezel. The power and reset buttons are wired to work and the front led indicates power on-status.
And yes, it plays NES games through an emulator using the original pad. I use the pad as a mouse with driver software (there's plenty, google for it) and a fold-away bluetooth keyboard.
Working on this took me about 8 hours, not including the time spent waiting for the paint to dry up for sanding hardness. I got the logotype for the lid from a buddy of mine who works at a sticker shop, it's custom cut to size from a .PDF.
If you have any questions about this build feel free to ask away in the comments section!
(I'm in no way affiliated with Nintendo or any of it's partners.)
edit: A norwegian IT-site also noticed my little project and posted a comparison with it and another NES mod built to an utouched case. Le Journal Du Geek has a small piece about it french too.
As for the obvious question "why white? - well, almost everything else in our apartment is white so the original NES box was a bit of an eyesore on the TV-stand. I also wanted to tinker around with more than just the insides, which were pretty easy and straightforward to install and got inspired by some blogs about finishing a spray paint job to mirror shine. That didn't exactly work out, but turned out good enough. Also, I happen to like it that way :)