"The main voice talents of The Simpsons (Dan Castelenetta (sp) Julie Kavner, Nancy Cartwright, Yeardley Smith) were just inked to a group renewal of around $400,000 an episode for four more years. I don't think The Simpsons is going anywhere anytime soon. No shark jump there."
I don't disagree - the Simpsons isn't appointment television for me anymore. If I'm around when it's on, I watch - but it's been around to long for me to bother to set the DVR for it. But when I do see it, I think it's still fresh and well written. It could go on for a number of years yet.
On the other hand, it seems like those huge star salaries often come along in the last year or two of a show's run, when the network is trying to eke out another year or two of a profitable franchise. Think Seinfeld and Friends.