PC World reports that the JailbreakMe website is using a serious security flaw to jailbreak the iPhone
JailbreakMe makes the process of jailbreaking the Apple iPhone much simpler and less intimidating. Just visit a Web site on the iPhone, and voila! Jailbroken iPhone. Think about that for a minute, though. The simple act of visiting a Web site is able to fundamentally alter the core functionality of iOS.JailbreakMe Exploits Serious iPhone Security Flaw