Since Wal-mart had the iPhone 4 on launch day, does anyone know or have any guesses whether they will have the 4S at launch? I live in MA, where Apple and AT&T will both charge me sales tax on the full unsubsidized price of the phone (by state law)- $60 tax on a 64GB- but I've heard that Wal-mart does not pass this tax on to the customer.