Willie says that bees are dying "all over the world, from Glasgow to Edinburgh." Glasgow is the largest city in Scotland; Edinburgh is the capital. The two are 46 miles (74 km) apart.
The tiny headstones for Groundskeeper Willie's bees bear names like "Bee Arthur," "Bee Bee King," "Susan Bee Anthony," and Jerry Seinfeld, who played a bee in the film 'Bee Movie.'
The music playing over the Billionaires' Camp montage is "Dance of the Hours" by Poncielli. Comedian Allan Sherman used this music to write "Hello Muddah, Hello Faddah," his parody song about a summer camp.
Real life billionaires referenced in this episode include Bill Gates, Warren Buffet, Rupert Murdoch (who owns the Fox Network), and Jeff Bezos and Mark Cuban, who appear as themselves.
Despite this episode having a Christmas-themed intro (and originally being aired in December 2008), it surprisingly isn't a Christmas episode.