Macmini Nes 3
Brent writes – “Well, someone had to do it! The Mac Mini NES was an idea born out necessity, and a love of the hardware modification arts. Necessity because I owned an internal DVD writer for my previous PC and, with the switch to an Apple PC, I was left to use an IDE to USB adapter (enclosures are expensive). This was to much of a ghetto looking setup for my taste. Most of all, the two tone 8-bit console has appealing style and is a famous icon of console gaming (not to mention, ideal dimensions for a desktop system.)” – [via] Link.

If you want to really retro out, check out Retro Game Heaven: The Atari 2600 PC. After fitting a full-featured wireless PC system into an old Atari 2600 case, you can watch movies, surf the web, and play hundreds of retro games. Info and article.