Apple is trying to get smart, however the iPhone DevTeam seems to have them beat. iTunes 8.0 has new features that prevent the Pwnage exploit on iPhones and iPod Touch models that have not already been jailbroken. iTunes 8.0 will not allow restores to a hacked IPSW archive on a factory firmware device. Syncing is possible, however, if the device has already been Pwned.
The problem for Apple is that PwnageTool works by exploiting a hardware bug. According to the iPhone DevTeam, this means that Apple can use software to prevent jailbreaking, but only until the DevTeam comes up with new countermeasures in the form of patches. DevTeam has already released a software patch to circumvent iTunes 8.0 when jailbreaking a clean iPod Touch.
According to the DevTeam blog, by next week a complete set of software patches will be released to render iTunes 8.0 impotent in the fight against jailbreaking. This should include a patch for new iPhone owners who have upgraded to iTunes 8.0 and plan to use the PwnageTool next. Surely this is only the next phase in what has already been a game of high-tech cat and mouse.