Dev Team has found a way to jailbreak the newest version of the iPhone OS, OS 3.1. The hack requires that you’ve jailbroken the phone for either 3.0 or 3.0.1. The jailbreak was previously unavailable for the newest iPhone model. If you purchased a new phone that comes with 3.1 pre-installed, you’re out of luck. There is no method for jailbreaking the device from that state at this time. You know someone will find it within the next few months, though. It only takes so long.