Can I Jailbreak iPhone OS 3.0?
iPhone Dev-Team has reported that Apple's iPhone OS 3.0 beta 5 has been jailbroken. In fact, unless changes to iPhone hardware are made in the next generation device, the Dev-Team reports that the jailbreak will work on all existing iPhones and iPod Touches.
Jailbreak apps such as Cycorder and Qik do not currently work using iPhone OS 3.0, and more beta releases are on the way. As a result, the iPhone Dev-Team plans to wait until a final release from Apple before releasing a new PwnageTool and QuickPwn.