Erica Sadun has confirmed that she was able to jailbreak her Apple TV with Limera1n; however, it does not install OpenSSH at this time, so not much can be done with it.
Pod2g has chimed in to a series of tweets from jailbreak developers that suggests a publicly releasable jailbreak has been found but is just waiting for the release of iOS 6.1.
Pod2g, a member of the evad3rs, the team that released the original evasi0n jailbreak, says he is getting more and more confident that we will see an iOS 7 public jailbreak!