Among the other names listed on Detective Lassiter's "Crap List" are Hillary Clinton (who is on there more than once) & Michael Moore.
On Lassiters "crap list" about half way down is Andy Berman, a producer and writer for the show.
On Lassiter's (Timothy Omundson) "Crap List", you can see Tyne Daly's name. They starred together on the show "Judging Amy". Tyne played Maxine Gray, and Timothy Omundson played her boss, Sean Potter.
Twice during this episode, both Shawn (James Roday) and Gus (Dule Hill) mention the name of a person they know. Gus replies to Shawn's comment of wrapping this case up with "So we can rub it in Jeff Garrett's face" as they are walking up the stairs of the lawyer's house. The second time is when Gus pulls out his phone just after they leave Dennis's (Freddie Prinze, Jr.) house. Shawn says, "Tell me you're not calling Jeff Garrett." This could be a nod to previous producer/co-producer of Psych Geoff Garrett.
Shawn says to solve the case they'll need a Speak & Spell and 7 pounds of mashed potatoes. This is a reference to E.T. and Close Encounters of the Third Kind respectively.