Cameron and Tyler Winklevoss have had a busy year. After settling a multimillion-dollar lawsuit against Facebook founder Mark Zuckerberg over accusations that he stole their idea for the social-networking site, the identical twins have been pursuing MBAs at Oxford and spots on the US National Crew Team. Their battle with Zuckerberg will also soon be brought to the screen in “The Social Network,” David Fincher‘s adaptation of Ben Mezrich‘s “The Accidental Billionaires: The Founding of Facebook, A Tale of Sex, Money, Genius and Betrayal.” (“West Wing” creator Aaron Sorkin wrote the screenplay.) Asked how he felt about the casting of “Gossip Girl” guest star Armie Hammer at the Guest of a Guest holiday party, Cameron joked, “He’s too good-looking to be playing Tyler.” Justin Timberlake, Rashida Jones and Jesse Eisenberg will also star.