Harry Potter and the Deathly Hallows won't materialize in bookstores for another three months, but J.K. Rowling's final installment in her boy-wizard series has already broken a second record. ( Click here for the first.) According to Barnes & Noble, pre-orders for the 784-page title have exceeded 500,000, making it the publication with the most advance requests in the chain's history. Sheesh. Hope they're using recycled paper.