According to a couple threads, like this one, iPhone users are supposed to have free access to AT&Twifi hotspots. I was in a Barnes & Noble tonight, noticed the AT&T Hotspot sticker and decided to give it a try. No luck. I got an AT&T login/pay screen on my iPhone. So, is this an urban legend? Is there a special login that you need to have? Or something else? People claim to have done this, but for real?