Matt Damon's London street scene--showing Linus walking through London speaking on the phone--was shot while Matt Damon was in London filming "The Bourne Ultimatum". The Ocean's Thirteen production took advantage of this happy coincidence as they wanted the character Greco to be a British classmate of Roman Nagel. Thus Linus's being in London played well to the story.
The phrase "Billy Martin" that Danny mentions to Willy Bank during Reuben's hospitalization is gambling slang for "a second chance." The phrase refers to famed Major League Baseball manager, Billy Martin. Despite his talents as a manager (he led the New York Yankees to two World Series titles), Martin's fiery temper, fueled by his alcoholism, often got him into trouble and, as a result, he was fired multiple times. Despite his character flaws, Billy Martin was always being given "a second chance."
(@ 1:37:15) The numbers that "Mr. Weng" picks to win at the roulette wheel are 11, 12, and 13--a reference to the three "Ocean's Trilogy" titles.
The special scent that Linus puts on his neck to seduce Abigail is noted in a title card as "The Gilroy." This is an in-joke on Tony Gilroy who wrote the screenplays for La Mémoire dans la peau (2002), La Mort dans la peau (2004), and La Vengeance dans la peau (2007), all starring Matt Damon. Gilroy also wrote and directed Michael Clayton (2007), which stars George Clooney and is produced by Steven Soderbergh.
The gold cellphone Willie Bank receives from Abigail Sponder was custom made by Samsung for the movie.