The book that Esteban Vihaio (Michael Parks) is reading in the whorehouse is titled The Carrucan's [some word I can't remember] by Jasmine Yuen. I assume it's a reference to second assistant camera operator Jasmine Yuen Carrucan and not an actual book.
I did a Google search for "black mamba gargantuan" to see if Elle (Daryl Hannah) really did find out about the black mamba from the Internet. Apparently she did, if slightly paraphrased. "Black mamba neurotoxic venom is one of nature's most efficient poisons, acting on the nervous system...the amounts delivered in a bite can be gargantuan: 100 to 400 milligrams, when 10 to 15 milligrams are fatal for a human being."
Loved Daryl Hannah's pantsuit.
Tarantino's voice dub for Pai Mei is his best acting job ever.