If you are considering using the pololu servo controller, you need to study the below and other info on the pololu site to ensure you understand how it operates and the control commands. I'm more familiar with the ssc-32 servo controller and it uses simple ascii characters for the various control commands. The ssc-32 (~$40) has been used for a long time for controlling 18 servo hexapods and such. The standalone controllers simplify controlling the speed and timed movement of the individual servos if required.
http://www.lynxmotion.com/p-395-ssc-32-servo-controller.aspx