There is a group of very bright and talented individuals working on a lead that could result in a usable jailbreak for the 3rd gen Apple TV. While there is no telling how long this process could take, we remain optimistic that a jailbreak for this device will be available in the future. For the record, no one at FireCore is involved in the jailbreak discovery process.
This follows a recent tweet from pod2g who said that he was not working on a jailbreak for the device and did not know of anyone who was.
While this news does offer some hope for Apple TV 3 owners; unfortunately, the latest device is viewed as the hardest of Apple's iOS devices to jailbreak since the attack surface is so small.