London Call Girl and Showtime's Secret Diary of a Call Girl reveals herself to be a cancer scientist with a PhD--Dr. Brooke Magnanti,
And for those hedge fund types in London that said "they" were with "her" she had this disclaimer in her book:
"If you read something and agree with it, then yes, it was definitely about you. If you read somehting and disagree, then of course it was a composite and not based on you at all."
But she said she's going to keep up with her blog for a bit more--"I'd like her to have a happy ending!"