Barry Diller likes to talk up how New Yorky his Manhattan-headquartered IAC is, but in fact, his most important online businesses are based in California, like San Francisco-area IAC workers are having their holiday party tonight at the Independent, 628 Divisadero St. "Bonus points to anyone who videos themselves gaining entry as Vimeo staff wearing their best American Apparel hoodie and art-skool glasses," says a Grinch of a tipster.