Apple today issued the following statement:
Apple has discovered that many of the unauthorized iPhone unlocking programs available on the Internet cause irreparable damage to the iPhone’s software, which will likely result in the modified iPhone becoming permanently inoperable when a future Apple-supplied iPhone software update is installed. Apple plans to release the next iPhone software update, containing many new features including the iTunes Wi-Fi Music Store (www.itunes.com), later this week. Apple strongly discourages users from installing unauthorized unlocking programs on their iPhones. Users who make unauthorized modifications to the software on their iPhone violate their iPhone software license agreement and void their warranty. The permanent inability to use an iPhone due to installing unlocking software is not covered under the iPhone’s warranty.
It sounds pretty clear to me that Apple has no intention of letting this unlocking business slide, and is going so far as to brick iPhones that are unlocked. If I were you, and I had one unlocked that didn’t have to be – I’d restore that bad boy to its original state….otherwise, you may be kissing it goodbye.