Support for servo motors is partially complete. On the Arduino side, a new pin mode of 2 has been added corresponding to servo control mode. This mode can only be set on PWM pins. There is also a new SERVO command requesting the angle of any attached servo (pins not in servo mode report an angle of "?") and a SERVO= command setting the angle of attached servos (pins not in servo mode cannot be set and are ignored).
My next goal will be to support servo mode in the UI and allow graphical management of servo angles.