If you've got a choice of stores where you can reserve your new phone, may we suggest you consider Radio Shack? Edible Apple reports
that the fine folks at the Shack (as noted on the company's Twitter account
) are accepting trade-ins for discounts on the iPhone 4. In fact, if you've got a 3GS in good working condition that you're willing to give up, you might get $200 off your purchase -- meaning that you could pick up a new 16GB iPhone 4 for a grand total of nothing, plus tax.
Thanks Chris and John