Save yourself some wasted effort by checking on iPhone 3GS availability online first before you get in your car and head down to the store.
There's no such centralized interface for AT&T, so who knows how many they have. For a place that sells phones, they sure don't like to answer them all that promptly (in our experience). [Apple]
Send an email to Jason Chen, the author of this post, at jchen@gizmodo.com.








