By this episode's end, Bender possesses the only robotic Free Will Unit in existence. Because of this, it's possible that Bender is now the only robotic being in the Futurama universe who actually possesses free will.
The gang Bender joins is called "The Ink Jets". This references both inkjet printing and the Jets, one of the rival gangs from the musical West Side Story.
The robot tattooist has the name of the printer manufacturer, Epson, written upside down on its chest.
The tattooist also has a binary code on his back (10011101), which is ascii for ¥. The ¥ symbol is used to represent a form of Japanese currency known as the Yen. This is likely a reference to the Yakuza (Japanese equivalent to the mafia).
The Hyper-Chicken's speech is extremely similar to Atticus' speech to the jury in To Kill a Mockingbird.
The shot of Bender working at the gears with his fellow monks resembles the painting Relativity by Dutch illustrator M. C. Escher.
The M.C. Escher reference could be a further allusion to Gödel, Escher, Bach: An Eternal Golden Braid by Douglas Hofstadter, a book that investigates the theme of artificial intelligence through the works of M.C. Escher.
