Adrian Crenshaw discusses "anti-forensics" at Notacon 7, focusing on the assembly of a small device called a Programmable HID USB Keystroke Dongle, or PHUKD for short--some cyberpunk James Bond type shit which can be programmed to execute commands upon being plugged into a target computer. So you can, say, open a new text file in Notepad on your boss's machine and have it type "We do not forgive. We do not forget. Expect us." and then get fired. Or any number of other, more subtle and nefarious things your imagination can come up with.
You might need to crank the volume, as the camera/audio work isn't exactly top notch.
http://www.irongeek.com/i.php?page=security/programmable-hid-usb-keystroke-dongle






