There's actually a few television documentaries about this, I'm not sure if it's these guys or other guys (I didn't read tfa), but I remember seeing a guy that had made a special set of glasses and inside the glasses he had put a few tiny LEDs connected to a computer and a switch in his shoe. The switch in his shoe would input the cards on the table, and the computer would calculate the best move and signal it to him with the LEDs in his glasses. Crazy.