Re: 7X04 The Power Of Three (Grading/Discussion) (SPOILERS!)
^^Indeed, Cubed was the working title for the episode, which I'm guessing is why Amy repeated the word "cubed" a few times in the episode's closing narration.
"Internet message boards aren't as funny today as they were ten years ago. I've stopped reading new posts." -The Simpsons 20th anniversary special.