I read that somewhere online today, and the article said he was only joking. The Simpsons
can't end until atleast 2005, which is the end of its 15th season. All of the cast's contracts were renwed until then for $1 Million each an episode. Of course Fox can “cancel” it if they wanted to, but the show is still profitable and it'd cost them even more to pay off the voice actor's contracts. I'm sure will see our beloved family for atleast 3 more years.

I am sad to say though that when 2005 rolls around, that will most likely be the end. Dan “Homer” Castellenata was on the radio this morning, said they already recorded next season's dialogue and half of the season after that.