A JTAG cable....
Yes its a usb device with a JTAG interface, but its not a simple cable...... (AVR dragon)
Oh the 1.2.5 firmware that was released by Nassar on the forum?
This 1.2.5 firmware that everybody modifies all came from the same source....BFL. Nobody created firmware from scratch. You cant even load the original firmware (1.0.0) from the Jala because its protected.