Trivia: When Bond is sending his resignation there is a quick shot of his emails. If you look at the email addresses, they are all (or most of them) people who worked on the production of Casino Royale - A few I have noticed and looked up are Chris McBride (computer & video supervisor), David Hicks (lead motion graphics designer) and Neil Pinkawa (lead screen graphics artist).
Trivia: Casino Royale was originally supposed to have been the inaugural film of a rival James Bond series produced by Sony. MGM/UA would later acquire Sony's Bond properties in exchange for the Spider-Man franchise.
Trivia: Former James Bond Sir Roger Moore enjoyed the film so much, he purchased the DVD.
Answer: From the novel: "Three measures of Gordon's, one of vodka, half a measure of Kina Lillet. Shake it very well until it's ice-cold, then add a large thin slice of lemon peel."
Captain Defenestrator