During "Sex and the Daten City", the film that features a director named David Shyamalan refers to two film makers: Writer David Lynch and Writer Director M. Night Shyamalan. In the dub, the director is Roman Polanski.
During "The Buzz of the Beehive", if you look closely at the background of one scene, you will see a huge crowd containing: Simon, Nia, Leeron and Kamina, from Gurren Lagann (2007); Viral, Yoko, Nono, Lal'c and Tycho from Gunbuster 2: Diebuster (2004); Haruko and Naoto from FLCL (2000) (all three shows were produced by studio GAINAX, which produces this show); Naruto from Naruto (2002); Fry from Futurama (1999) and Bubbles from The Powerpuff Girls (1998).
At the end of "Sex and the Daten City", Stocking goes on YouTube. Although the site has a blatant YouTube logo, it resembles more of a cross between the former and Nico Nico Douga a Japanese video-sharing service much like YouTube.