By adding an Xbee Module with the use of my Xbee shield, I was able to make the Arduino wireless. A second Xbee Module was attached to the ER1 through a Xbee explorer USB. Once the connection was successfully made, as if by magic the same program I wrote yesterday, which randomly moved the robot based on characters received over the serial port, ran just as it did yesterday. The system is now wireless!

Xbee Shield on Arduino and Xbee explorer attached to ER1