Much awaited iPhone OS 3.1 Jailbreak seems to be on the horizon but this time instead of the usual iPhone Dev Team, Chronic Dev Team seems to be taking the crown for 3.1 jailbreak as hints on their coming jailbreaking utility Greenpois0n start appearing on internet, the Chronic Dev Team earlier tweeted that iPhone OS 3.1 is still vulnerable and they are working on a jailbreak - now to make things more interesting they have posted a video showing proof-of-concept demonstrating the exploit working on iPod Touch 3G (video after the jump), they have named the exploit Greenpois0n and the site is already online waiting to be updated with a working jailbreak for iPhone OS 3.1 ;).

Now this is really some hot news on the iPhone front, according to the information uncovered by Jonathan Zdziarski author of the book iPhone Open Application Development and an iPhone Forensics manual, Apple seems to have included has a application blacklisting mechanism in the latest iPhone OS 2.x, using which the device can phone back home and check for unauthorized applications, and disable them if found on the blacklist acting as a hidden kill switch.

While doing extensive forensic examination of the iPhone 3G, Jonathan found a configuration file deep inside the Core Location having callback to the below URL on Apple Site: