this kinda really isn't a reference, but when we first see The Bride driving the Pussy Wagon in passadena -- before it's explained why she would be driving that truck -- this totally reminded me of when I first saw Pulp Fiction and we see Jules and Vincent go from their black suits in the apt. to shorts and t-shirts at the bar. remember that? it was like, why the hell are these guys in beach clothes all of a sudden, and then it's of course explained later.
I LOVE THAT SHIT!
Actually, I see The Pussy Wagon as a more specific riff on Pulp Fiction. It's exactly like Zed's motorcycle: it's souped up, has a "personalized keychain," and was owned by a macho pervert before that pervert was vengefully slaughtered by the sword-wielding hero/heroine of the film (who subsequently makes the vehicle his/her own).
Another similar Pulp Fiction riff: In both films, a comatose Uma Thurman is revived when she's penetrated by a sharp, syringe-like foreign object. In PF, it's actually an adrenaline-filled syringe; in KB, it's a mosquito.