Its official, GreenPois0n tool will be released on October 10th, 2010 at 10:10:10AM. p0sixninja (Joshua Hill), the man behind GreenPois0n tool and member of Chronic Dev-Team confirmed that they will be releasing GreenPois0n tool on the upcoming Sunday.
Update via @p0sixninja:
Previously p0sixninja confirmed that GreenPois0n will do a hactivated jailbreak on all iOS devices. However its not sure whether it'll be a tethered or an untethered jailbreak. Hactivated jailbreak means you don't need official SIM card to bypass the iTunes activation screen and untethered jailbreak means you will not loose your jailbreak if your phone goes off due to low battery or any other reason. Stay tuned! We will update you as soon as we'll hear any news. [via Twitter]
Update1: GreenPois0n will Jailbreak iOS 4.1 on iPhone 4, iPod Touch 4G, Apple TV & iPad
Update2: GreenPois0n Tool Released [Download for Windows & Mac]
Update3: How to Jailbreak iOS 4.1 on iPhone 4 & iPhone 3GS with GreenPois0n Tool?
Update4: How to Jailbreak iPod Touch 4G/3G iOS 4.1 & iPad iOS 3.2.2 with GreenPois0n?