TechKeys

Techkeys Keyboard Business Card

TechKeys is serious about custom keyboards, and to prove it, they created a business card that is a functioning keyboard.  This PCB with on-board re-programmable ATMEGA16U2 is perfect for hackers, tinkerers, and makers.  

As seen on Gizmodo

Assembled option comes with 3 Gateron Blue Switches soldered onto the board making it ready to plug in and go.