Finally a long wait for iOS 4.1 jailbreak is going to end, P0sixninja has announced that the Greenpois0n jailbreak will be released on October 10th at 10:10:10AM GMT.
Things have progressed to the point where we don’t expect anymore roadblocks. ETA for greenpois0n is 10/10/10 at 10:10:10AM
The jailbreak is based on the SHAtter exploit found by pod2g. It will likely be released at http://greenpois0n.com/ and will include the ability to hacktivate. With the iPhone you greenpois0n hacktivate which is important for people who have no official iPhone SIM card to activate. Upon activation, the iPhone registered with an official operator.
iHackintosh posted some stuff you should know about the upcoming jailbreak as follows.
1. Greenpois0n jailbreak supports iPhone 4, iPad, iPod touch 4G and most probably Apple TV. No support for iPhone 3GS, 3G and iPod touch 2G, 3G.
2. iPhone 4 unlockers should wait for Dev team to release pwnage tool (which is supposed to release very short after Greenpoison).
3. Once again! the ultrasn0w carrier unlock won’t work on 4.1′s baseband (and you can’t go back to earlier basebands) if you want to preserve your iPhone 4 unlock stay away from restore/update to stock IPSW.
4. We will be posting tutorials on how to jailbreak your specific device as soon as the jailbreak is available.