Jailbreak Ipod Touch 3rd generation MC model 4.0

Is there anyway to jailbreak this model yet? I've searched around and tried a few different methods/versions but have had no luck. I've read that there is a software package out there but I can't find it. Can anyone point me in the right direction? I don't know a lot about this stuff. I had it jailbroken when I had OS 3 on it so I'm a bit familiar with the process, but not with the different options of doing so (redsnow, blacksnow, whatever, ).

Any help would be appreciated.