Chronic Dev-Team's member P0sixninja has been working on the GreenPois0n jailbreak for quite a while which will be used to jailbreak iPhone, iPod Touch and iPad. A few days earlier it was reported that a new bootrom exploit to jailbreak iPhone 4, 3GS, iPod Touch 4G and iPad found by Pod2g who's also from the Chronic Dev-Team and now the site http://greenpois0n.com/ has got an update.

The reason behind not releasing the GreenPois0n jailbreak was because Chronic Dev-Team and iPhone Dev-Team decided to work on JailbreakMe. The update is that Pod2g has confirmed that GreenPois0n works fine to jailbreak iPhone 4 on iOS 4.1. MuscleNerd also reported that iPod Touch 4G and iPad are also vulnerable to the exploit.

The Chronic Dev-Teams site has been updated with a new logo which shows that GreenPois0n will arrive soon from the team and will Jailbreak iOS 4.1. The jailbreak will work on both Windows and Mac OS X.

Source