p0sixspwn untether was updated to 1.3-2 in Cydia (Fixes LTE/iMessage bugs). Go to changes and tap Refresh to grab it.
It also adds AppleTV2 support for the lovely @nitoTV :P
Hopefully, we'll see a utility updated for performing a jailbreak of the Apple TV 2 shortly. Please follow iClarified on Twitter, Facebook, Google+, or RSS for updates.