My life story below can be paraphrased as: "Can you give some advice on things I should or shouldn't do when making a GUI for robot control?"[/color]
I know you don't like reading... 
Hey guys! I made a simple 2 servo robot with IR distance detection and a speaker using the Parrallax BoeBot kit for Arduino. I decided to go off on a random tangent and make the robot controllable by the arrow keys on a computer. I then decided to make a simple GUI for the robot since I had the Serial ports all set up anyway. I'm using processing to write the program and so far I have a graphical representation of the arrow keys that light up when their key is hit and a box that displays the current speeds of the servos. I'm going to add a button that makes the robot beep a selected note and add a display for the IR distances. I have a few other things in mind, but I really need some suggestions. I want to make it as compatible with different arduinos/situations as possible and have a lot of useful features as well as being user freindly. Let me know some cool things I should add or things I should look out for. Thanks!