When Earl's dad is handing out buttons after the live debate, at the end of the scene there's is another High Def easter egg. Just as the scene is about to cut to Randy handing out cookies is a sign at the extreme left. The sign reads: "Carl Hickey Loves High Def"
Beau Bridges (Carl Hickey) plays General Hank Landry in Stargate SG-1 and Atlantis. Near the end of the show, Carl Hickey mentions a John Shepard, who was repaid for a broken window from 15 years ago by Earl Hickey. Col. John Shepard (later Major) is a main character in Stargate Atlantis.
First physical appearance of Chubby's strip club, but not Chubby himself.