The Radioactive Man TV series (the "campy '70s version") is an obvious reference to, and spoof of, the Batman TV series of the 1960s. Promotions prior to the blockbuster 1989 Tim Burton film Batman has said that it would "not be like the campy TV series of the 1960s".
The remark that kids would want to see the original Radioactive Man was a likely reference to Adam West, who had auditioned for the leading role in the 1989 film Batman, and had been taken into consideration on whether to stay loyal to the fan base of the 1960s show.
Jeffery Albertson has a flying toasters screensaver on his computer during the first act.
If Moe really was a part of the Little Rascals (who were actually referred to as "Our Gang"; "The Little Rascals" was the name given to the shorts when they were syndicated to television), then he'd be really old (around 80-ish).
Bart was told he needed to grow an inch to get the part of Fallout Boy. But Millhouse eventually got the part and he is shorter than Bart.