Think you know your iPhone? Or did you just think that giant lineup was for John Mayer tickets? While you wait for the seconds to tick by until this year's It gadget goes on sale at 6 p.m., you can test your knowledge of the iPhone and its yet-to-be-determined legacy by taking our iPhone Quiz. Are you indeed ready to endure such a massive dose of Apple-y goodness? We're not sure about that, but the quiz is pretty fun. Follow the link to get started.