iCry writes:

“It was rumored last week, and Apple has now confirmed it: ‘Apple said today that a firmware update to the iPhone due to be released later this week “will likely result” in SIM-unlocked iPhones turning into very expensive bricks… So what are users of SIM-unlocked iPhones to do? Not run the latest software update, that’s for sure. Users can instead pray to the hacking deities – the famed iPhone Dev Team that released the free software unlock, and iPhoneSIMfree, which released a commercial software unlock – to write applications that will undo the unlocks, as it were, if those users want to run the latest iPhone software.'”

http://hardware.slashdot.org/hardware/07/09/25/0155219.shtml