The USB dev board I'm using is a Teensy++ from: http://www.pjrc.com/
In the video the blob over half the board is JB Weld. Broke the usb interface twice - second time I ripped the interface right off the board. Ended up having to rebuild the Power, Ground traces and had to replace one of the usb resisters. But it still works!
PS: The interface breaking was my stupidity, the board is well designed and works wonderfuly. I don't want to send the wrong message. These boards are great and I would by another one without a second thought.