Although widely reported to be true, Bryan Callen is not Joe Rogan's half brother. Rogan explained in a radio interview that he refers to Callen as his "brother from another mother" to explain the close friendship they have.
Two of Joe's brothers--Jack and Russ--are played by Bryan Callen and Nick DiPaolo. These actors now appear on the same show: "TruTV's Smoking Gun Presents World's Dumbest." Both are both regular commentators.
During the candidate's showcase, Beth asks Lisa what kind of tree she would be, a reference to Barbara Walters famously asking Katharine Hepburn the same thing in a 1981 interview.