I assume you're talking about SHAtter? Apparently it's an untethered bootrom exploit, so it's going to work on all all new bootrom iOS devices regardless of the OS version. They aren't waiting for 4.2, it just takes time to develop a bootrom jailbreak.they have a JB for 4.1 but it makes no sense since all devices(ipad) will align to 4.2 in a month or two - save the JB for that. plus it's going to be tethered at this rate. you guys remember tethered jb's? Unless comex pulls something out of his arse.
SHAtter isn't out yet. I'm not sure what jailbreak you'd be referring to that's tethered.i thought it was tethered on most modern devices.