Chronic-Dev, the folks behind the GreenPois0n jailbreak, which will soon allow us to jb our 4.1 devices has posted a minor update on their official blog letting us know that they are still hard at work:
Many people in the comments are asking for a progress update. Any kind of update that we could actually give would be too technical for anyone to understand anyway, not to mention potentially reveal the exploit. Just know that things are going swimmingly and we are working as hard as we can.
There you have it, folks. They are still working, and things are going as planned. They can't say much, because most of us would have no idea what it means anyway, and they don't want to tell the world what the exploit is and have it patched quickly.