Greenpois0n RC6 breaks new Apple TV's bonds, available for both Mac & Windows

The newest version of greenpois0n (RC6) might pique your jailbreak interests. It'll perform an untethered jailbreak (means, you can reboot your iProduct without the need to re-JB), freeing your device (iPhone, iPad, etc.) running 4.2.1 and allow you to fulfill all of your out-of-jail needs.

Also it is has a loader that'll inject nitoTV right onto your little black Apple box.

According to Tweet of @pod2g, this new greenpois0n is said to fix emulation problems (zodttd's emulators were having issues) and can be applied right over your device that's been freed with RC5.

Hit the link here to grab either the Mac or Windows version.