Note about 5.0.1 : don't update if you plan on jbking : the bug Charlie MILLER found can simplify exploits dramatically and will be closed.
Pod2g has announced that the code signing bug Charlie Miller found in iOS 5 will make creating a jailbreak much easier and warns users not to update to iOS 5.0.1.
Just two days ago, pod2g announced that he had found a vulnerability that could untether the jailbreak for iOS 5. At that time we were told not to expect a release soon; however, Miller's bug could speed up the timetable for release.
Apple today announced iPhone 4S packed with new features including Apple's dual-core A5 chip; all new camera with advanced optics; full 1080p HD resolution video recording; and Siri, an intelligent assistant that helps you get things done just by asking.