Amy makes a comment about Jill getting fat in the ass and face, which is an in joke, as Reese Witherspoon was pregnant at the time of the episode shooting.
There's an outtake of the scene when Amy tells Rachel about her new boyfriend. In one when Amy asks Rachel if she remembers her old boyfriend Mark and then tells Rachel she's dating his father the little girl playing Emma giggled right after and both Jennifer Anniston and Christina Applegate both started laughing at the timing.
Although they share no scenes, in this episode Christina Applegate and Paul Rudd guest star. They've also starred together in the Ron Burgundy films.
Christina Applegate guest stars on this episode, whereas Matt Le Blanc guest starred on three episodes (seasons 5&6 as Vinnie Varducci) of Married with Children, which starred Christina Applegate.
In a spanning shot of NYC, the twin towers appear briefly. This is after 9/11, so the twin towers are no longer there.