http://www.salon.com/tech/machinist/blog/2007/09/24/apple_unlocked/print.html

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By Farhad Manjoo
Sep. 24, 2007 | Uh oh. You freedom-loving geeks who unlocked your iPhone from AT&T thought you were so smart, but has Apple got a surprise for you. In a statement, the firm warns that unlocked phones may become "permanently inoperable" when the phone is updated with new Apple software (which the company is putting out later this week). Moreover, it says, people whose phones are rendered useless as a result of unlocking aren't covered under warranty. Ouch!
Is this just bluster meant to discourage people from unlocking? And if it's true, was the permanent breakage of the iPhone an unavoidable thing, or did Apple specifically engineer its updates to ruin unlocked phones? At the moment we've only questions, no answers.
But if you're the owner of an AT&T-free iPhone and you dare to update it, let me know what happens, kay?
Here's Apple's statement in full:
-- By Farhad Manjoo