Automatic unlocking sounds like a pipe dream given the American business landscape, but there shouldn't be any barriers to unlocking, even if the customer has to request it. People are likely stuck in the mindset of yesteryear where phones weren't transferrable between carriers (especially with band compatibility of GSM vs CDMA), and I'd wager that many people don't even realize it's possible these days. I can't say I blame carriers for wanting to maintain the illusion, and I don't necessarily think they should be forced to advertise it, but the option should be plain and simple for those who want to exercise the right.