AT&T is offering free WiFi at their hotspots (Barnes and Noble, Starbucks, etc…) for iPhone users after you enter your phone number for validation. The mischievous part of all of this, is that anyone with an AT&T account can access the free WiFi if they just switch their browser’s user agent to Mobile Safari. Seems like a simple enough hole to plug so don’t expect this free internet to last for too long. You could always create your own since data plans seem to be going unlimited in a hurry using this bad boy.