Some Best Buy stores are going to offer those who did not pre-order an iPhone 4, the chance to be added to the list of those who did. Up to 11 am local time, a customer can pre-order the phone. Again, reps are supposed to be tight-lipped about when a phone might be made available to anyone who pre-orders on launch day and Best Buy employees are not allowed to participate. But with the expected "minimal" inventory, we can't really see that route being too successful for those who have not yet pre-ordered the phone.
Apple iPhone 4 Specifications