Well, if you can't beat 'em, then just keep 'em busy. That seems to be the thinking at Apple these days at least, which has ratcheted up its fight with the iPhone jailbreaking
community once again by updating the bootrom on iPhone 3GS units that started shipping in the past week. That was apparently first discovered by Mathieulh and later verified by iPhone Dev Team member "Muscle Nerd," who confirmed that the update (iBoot-359.3.2) renders the iPhone 3GS "impossible" to jailbreak for the time being. Of course, that time could well end up being fairly short, but if you just have to jailbreak a 3GS right now, you'll probably want to try to track down some old stock or snap up a refurbished unit.
[Via Daily Tech