GreenPois0n release candidate 6 now includes support for the second generation Apple TV is released. GreenPosi0n will give your Apple TV an untethered jailbreak and will also install the popular NitoTV software on it.
Here is apple tv jailbroken with pwnage tool 4.1.1 and Nito TV installed.
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[tags]jailbreak,hackers,hacking,greenpois0n,appletv2g,nitotv,apple tv 2g,pwnage[/tags]