Anything ra1n always involves extra work..
What does jailbreaking Appletv do? The same as any other device?
Greenpois0n(works on all devices and apple tv)
Limera1n(same shit,have to put in dfu mode and it tells you what to do)
limera1n
SHAtter (will only work on 4th gen devices:appletv,iphone4,and ipod touch 4gen)
not out yet