Thanks again for the replies.
You might have to keep your replies simplified as I have very little experience and I am just starting my adventure into Arduino.
I am just trying to construct a 'simple' obstacle avoiding robot and I am loosely following a plan from the The 'Make: Arduino Bots and Gadgets' book but they do not clearly show how they make the connections from the servos to the Arduino. Each servo has three connections, as you probably know, and I am not sure there are enough connections on the board.