The title characters are a reference to Nick and Nora Charles of "The Thin Man" films.
"fistful of assholes"
Dev suggests calling their band "Shit Sandwich"
"the neverending story" mentioned in dialogue
When Norah is in the bathroom stalls looking at the "Where's Fluffy?" writings, a sticker of Beavis and Butt-head can be briefly seen
Subject of an $8,000 question
Mentioned by Jimmy when introducing Kat Dennings
Seth and Kat Dennings talk about the movie they did together, and Seth shows two stills
In the scene with Gabriel's band playing, the drummer is wearing a "Where's Fluffy" shirt.
The movie is mentioned.
The main story in the first issue of The Diarrhea Times is a review of the movie
Correct response in category Movie Adjectives.
The soundtrack for Nick and Norah's Infinite Playlist is #8.
Nick O'Leary & Norah Silverberg get an honorable mention.
Nick O'Leary is #4.