The Prince family has "World's Greatest Dad" and "World's Greatest Son" mugs in the same fashion as Michael has a "World's Greatest Boss" mug in his office.
When Stanley is presenting his argument to explain why Hilary Swank is hot, you can see John Krasinski on the bottom-right corner of the screen briefly as he can't contain himself and laughs at Stanley's lines.
Rebecca, the granddaughter at Prince Paper Company, also has her own desk and nameplate where she is doing her homework.
Michael Scott goes undercover as Michael Scarn. That is the name of the main character of his screenplay 'Threat Level: Midnight'.
This is the first time that the door between the supplies cabinet and the conference room had been opened and interiors shown.