Crying shame, isn't it? I like the two so much I built a poll around them, and it's mostly because they are both such amusing characters with lots of plot quirks. You really could go far with them (ecspecially Hibbert, don't know why), and yet no Simpsons Comics writer really does.
It's at times like these when I want to abandon my lawyer/doctor/millionaire dream and become a comics writer. Then again, they don't let just anyone write comics, do they?