I have found this info from a few website saying ATV3 is successful jailbreak
“The Apple TV 3 has successfully been jailbroken and it is untethered,” is a phrase that we have all been eagerly awaiting for the past month now. Though there is no substantial information leading to any Apple TV 3 jailbreak ETA or even the current status of the jailbreak for Apple’s latest family member. Now, even with the seeming lack of information our there, we felt it would be good to put every in one place for our reader’s convenience.
pod2g, perhaps best know for his role in the 5.0 jailbreaking of the iPad 2 and the iPhone 4S, has been hard at work with the latests series of jailbreaks for the iPad 3 and everything underneath it. Though we have received good news in the form of a video showing his iPad 3 using an untethered jailbreak, he mentioned on Twitter: