Greenpois0n is the program you use on Mac or Windows to Jailbreak all of your iDevices. Well, the Chronic Dev Team just updated their software to RC6 (previously RC5). RC6 includes support for the Apple TV 2nd generation and some bug fixes as well. If you have been having problems with emulators on your devices, RC6 might be able to help you. The word is that you can Jailbreak with RC6 OVER RC5. Videos on the double Jailbreak and Apple TV Jailbreak coming up!