There are a number of references in the story that are out of date now, like Rosie O'Donnell, Blackwater, and Senator Larry Craig.
Krusty making a joke about OJ on his show. The kids' reaction is what you'd expect.
What an Idiot!: Sue Ellen's response upon learning that Mr. Burns plans to let the power plant meltdown and destroy Elwood City is to storm into his office and confront him, rather than contact the authorities.