Looks like the iPhone 3G won't be playing as hard to get as I originally thought. As of today, if you check out Apple's iPhone 3G inventory site, every Apple store across the US is fully stocked with 3G's.
What model will be the most difficult to get? Probably the black 8GB, which is only available at about 57 percent of the stores. And what about AT&T? Well because they are still filling back orders, their shelves are still looking sparse, so go to the Apple store if you need to get the goods!
Hopefully this means that new iPhone 3G adopters won't have to wait in any crazy long lines!