"The Simpsons" definitely is past its prime, and should probably be put down. From what I have seen of "Arrested Development," it is a great show, the highlight of that line-up ("Malcom in the Middle" was funny for a couple of seasons, but shows about kids can't last).
I miss Futurama.
Futurama was good, too. My favorite was the Slurm episode, a spoof of "Willie Wonka".
The teen-aged son on "Arrested Development" has the best dead-pan expression since Jack Benny.
The entire cast is terrific and the writing is hilarious. Too bad more people haven't found the show.