AT&T is limiting iPhone purchases to one unit per customer. This is the latest acknowledgement that iPhone stock is depleted ahead of what many believe is the forthcoming release of the next generation 3G iPhone.

As of 2 p.m. EST, the Apple Store is still showing both the 8GB and 16GB iPhone as unavailable. Apple is known for managing their stock well, so this is further evidence that a new model is around the corner. AT&T is also offering the 8GB model refurbished for $249, a savings of $150.

Source: The Boy Genius Report