This afternoon, a reader wrote to ask us: “Have you noticed a dramatic rise in FUD about the iPhone over the past week? Do you happen to know whose PR firm(s) is (are) behind all the articles? I’d love to see a Backstage article on this topic.” Our answers: No, sort of, and sure. Has iPhone FUD ("fear, uncertainty, and doubt") risen over the past week? No. There’s been FUD about the iPhone since January. This week is only different…