You didn't think Barnes & Noble was just going to let Amazon rest on its "vague sales milestones" laurels, did you? The veteran bookseller just announced that the Nook lineup -- 3G, WiFi, and the new Nook Color combined -- has become "the company's biggest bestseller ever in its nearly 40-year history." That's bigger than Barnes & Noble's sales (note: not global sales) of DaVinci Code or any of the Harry Potter novels. Unfortunately, we can't say exactly just how many that is, as the press release only announces "millions" being sold. A B&N rep
