When AT&T first offered free wifi access about a year ago, I quickly went to my local Barnes & Nobles bookstore to test it. I was greeted with a sign-on, and a confirmation text message to activate the free access. After that experience, I stopped trying to use the the free wifi; it was more of a hassle than a convenience.
After this latest news that the 3.0 OS automated the sign-on process, I once again made my way to the bookstore to test this new capability. I'm pleased to report that my iPhone detected the AT&T hotspot and switched from 3G to wifi.