Tech publisher O'Reilly Media has released a book targeted to unsanctioned developers on Apple's iPhone mobile platform. iPhone Open Application Development tells coders how to write programs for "jailbroken" iPhones — those that have been hacked to remove Apple's block on unsanctioned software. All of which seems outdated, now that Apple has released instructions for writing approved apps. O'Reilly will surely rush out another book on that subject. But why not just sell one book to everyone? That seems easier.

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