The wonderful devs who jailbreak iPhones have appeared to have already
jailbroken the iPhone 5. According to Grant Paul aka chpwn on the jailbreak scene, he's already got Cydia-the de facto jailbreak App Store-running on the new iPhone. However, just because devs have tapped into the iPhone 5 already, it doesn't mean a public availability for a jailbreak for regular joe schmo is imminent. There's still a lot of kinks to figure out. But of course it doesn't hurt to have a talented dev already crack the iPhone 5 and load Cydia onto it only a few hours after the phone's been released. So stay tuned.