Anyone currently hoping to stroll into an Apple store and pick up an iPhone 3GS might find their desired model out of stock. According to Apple’s iPhone 3GS Availability page, some stores are showing certain models as unavailable. A few stores are even completely out of stock of the 3GS, including the Orland Park Apple store in Illinois.
I’m sure Apple will likely make at least a couple more. If you can’t buy from an Apple store, you could try one of the four other stores that sell the iPhone.