The free WiFi at AT&T hotspots for the iPhone has been an interesting and on going saga. It has been confusing, with AT&T allowing free WiFi access, then just as fast, taking it away. Either way, it is back now, and more than that, it is official. Hopefully this time it is here to stay.
It seems that now, the access to the WiFi is included with iPhone plans. That is about as official as it can get and it is most likely you will not see AT&T disable it again. It is still not known if AT&T will deploy extra security measures, as anyone with a little know how can get free WiFi on there laptop using this offering.
The service is available at all of the 17,000 AT&T hot spots in the U.S. To use the service, all you have to do is connect to the hot spot using your iPhone. You will be presented with a screen that will ask you for your phone number. The number must be linked to a valid AT&T account, that has an iPhone active on it. This means that people with a jailbroken iPhone can not use the service. That is unless of course they have a buddy with an iPhone on AT&T.