Apple has updated its “how to buy” page for the iPhone 4S to reflect the fact that its retail stores in the United States and Canada are now accepting reservations for the new handset. As stated on the page, “iPhone 4S is available in store by reservation only. Reserve yours after 9:00 p.m. tonight for pickup tomorrow. When you come in, you’ll choose a carrier and plan, and we’ll get your iPhone up and running before you leave…
