"US government legalizes iPhone 'jailbreaking'".

Although such jailbreaking may no longer be a violation of criminal law, many have noted that it is still a violation of the contract between Apple and the iPhone purchaser and thus potentially still subject to civil penalties (depending on how the courts choose to interpret the contract):

"The Producer, the Librarian, and the Promise-​​Breaker"
"What the New DMCA Ruling on Copyright Actually Says"

Plus, given that Apple created the iPhone in the first place (thus offering tremendous value to customers), they should be able to set terms of use that prospective customers should be ethically obliged to follow. Anyone who doesn't wish to abide by Apple's terms is free to instead purchase an Android phone, a Blackberry, or any of the other competing smart phones.