The Cult of Tina FeySTina Fey—nerd-girl hero, Saturday Night Live alum, 30 Rock writer/actor—just signed a book deal. It was "reportedly pitched as a book of humorous essays in the style of Nora Ephron," said the Observer. (Hopefully it'll be funnier than that.) Successful SNL alums doing a humor book or half-baked movie spin-off is unremarkable. But a multi-million dollar advance and the defining pop culture moment of her a-little-too-accurate Sarah Palin impression is further evidence of her gathering stardom. Also: her Google trends are suddenly off the hook.This graph can be interpreted as a.) her Google trends, or b.) all of America getting it up for Tina. The Cult of Tina FeyS