Several Real Life porn performers had cameos. Nina Hartley appeared in several scenes as Little Bill's faithless wife. Veronica Hart is the judge at Amber Waves' custody hearing. More recent porn star Lil' Cinderella (credited as Amber Hunter) and Lexi Leigh have bit parts. Summer Cummings and Skye Blue share a Jacuzzi.
In a non-porn related example, Reed Rothchild shows off his magic skills to Kurt, who seems less than impressed. Kurt is played by Ricky Jay, a professional magician.