You'll need to do a much better job of describing the project. What, exactly, do the 7 servos do? What, exactly, is the relationship between the position of one potentiometer and the position of each of the servos?
Reading the potentiometer is trivial. Controlling the position of properly powered servos is trivial. Controlling the speed and direction of motors connected to a motor control shield, with proper power, is trivial.
Sending and receiving serial data is pretty simple.
The hard part is determining what to send, and when to send it. If you expect someone to write a program for you, to send the data, you still need to do that part.